Crataegus ×fallacina

Plant heights are relevant for the Czech Republic. They are measured in metres and relate to fully developed mature generative plants growing in the wild. Each taxon is characterized by two values: minimum (lower limit of the common range) and maximum (upper limit of the common range). The data were taken from the Key to the Flora of the Czech Republic (Kaplan et al. 2019).

Data source and citation

Kaplan Z., Danihelka J., Chrtek J. Jr., Kirschner J., Kubát K., Štěpánek J. & Štech M. (eds) (2019) Klíč ke květeně České republiky [Key to the flora of the Czech Republic]. Ed. 2. – Academia, Praha.

Life form classification follows the system of Raunkiaer (1934), which is based on the position of the buds that survive the unfavourable season. Macrophanerophytes are woody plants that bear the surviving buds at least 2 m above the ground, usually trees; nanophanerophytes are woody plants with surviving buds 0.3–2 m above the ground, usually shrubs; chamaephytes are herbs or low woody plants with surviving buds above the ground, but not more than 30 cm above it; hemicryptophytes are perennial or biennial herbs with surviving buds on aboveground shoots at the level of the ground; geophytes are perennial plants with surviving buds belowground, usually with bulbs, tubers or rhizomes; hydrophytes are plants with surviving buds in water, usually on the bottom of water bodies; therophytes are summer- or winter-annual herbs that survive the unfavourable season only as seeds germinating in autumn, winter or spring.

The data on life forms were taken from the Key to the Flora of the Czech Republic (Kaplan et al. 2019). Newly added alien taxa were assigned to the categories of life forms based on the FloraVeg.EU database (Dřevojan et al. 2022). Some taxa can belong to more than one life form. In such cases, the dominant life form is listed first.

Categories

• macrophanerophyte
• nanophanerophyte
• chamaephyte
• hemicryptophyte
• geophyte
• hydrophyte
• therophyte

Data source and citation

Kaplan Z., Danihelka J., Chrtek J. Jr., Kirschner J., Kubát K., Štěpánek J. & Štech M. (eds) (2019) Klíč ke květeně České republiky [Key to the flora of the Czech Republic]. Ed. 2. – Academia, Praha.

Further references

Dřevojan P., Čeplová N., Štěpánková P. & Axmanová I. (2022) Life form. – www.FloraVeg.EU.
Raunkiaer C. (1934) The life forms of plants and statistical plant geography. – Clarendon Press, Oxford.

Grime (1974, 1979) distinguished three basic ecological strategies of plants: competitive strategy (C), advantageous in habitats where resources are abundant, conditions not extreme and disturbance level is low; stress tolerant strategy (S), advantageous where resources are scarce, conditions severe, but disturbance is uncommon; and ruderal strategy (R), advantageous where resources are abundant and conditions not extreme, but disturbance level is high. There are also intermediate strategies in all possible combinations of the three basic types (CR, CS, SR, CSR). Data were taken from the BiolFlor database (Klotz & Kühn 2002).

Categories

• C – competitor
• CR – competitor/ruderal
• CS – competitor/stress-tolerator
• CSR – competitor/stress-tolerator/ruderal
• R – ruderal
• S – stress-tolerator
• SR – stress-tolerator/ruderal

Data source and citation

Klotz S. & Kühn I. (2002) Ökologische Strategietypen. – In: Klotz S., Kühn I. & Durka W. (eds), BIOLFLOR: eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 119–126.

Further references

Grime J. P. (1974) Vegetation classification by reference to strategies. – Nature 250: 26–31.
Grime J. P. (1979) Plant strategies and vegetation processes. – Wiley, Chichester.

Data on the presence of leaves on the plant, their metamorphoses and reductions are based on the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010) and the Key to the Flora of the Czech Republic (Kubát et al. 2002).

Categories

• leaves present, not modified
• leaves modified to spines
• leaves modified to tendrils
• leaves modified to phyllodes
• leaves modified to pitchers
• leaves reduced to collars
• leaves reduced to sheaths
• leaves reduced to scales
• leaves absent

Data source and citation

Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Kubát K., Hrouda L., Chrtek J. Jr., Kaplan Z., Kirschner J. & Štěpánek J. (eds) (2002) Klíč ke květeně České republiky [Key to the flora of the Czech Republic]. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.

Four basic types of leaf arrangement are distinguished: alternate, opposite, verticillate (whorled) and rosulate (in the basal rosette). The character is assessed in well-developed plants, i.e. not in individuals re-sprouting after damage by mowing or grazing or those with teratological modifications. More than one character state may occur (e.g. Hylotelephium jullianum and Salix purpurea) in some taxa: all character states are recorded in such cases.

In some plants, the arrangement of frondose bracts in the inflorescence is assessed separately (e.g. true leaves in Veronica persica and V. polita are opposite, while bracts are alternate). Leaves with interpetiolar stipules found in the Rubiaceae family are considered as whorled. The leaves in Rhamnus cathartica are considered as opposite, although in most cases they are sub-opposite.

The information was extracted mainly from the descriptions in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). In cases of uncertainties, mainly for alien taxa, additional sources were consulted, including the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994) and the Flora of Pakistan (www.tropicos.org/Project/Pakistan).

Categories

• alternate
• opposite
• verticillate
• rosulate

Data source and citation

Grulich V., Holubová D., Štěpánková P. & Řezníčková M. (2017) Leaf arrangement. – www.pladias.cz.

Further references

Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

The primary distinction is made between simple and compound leaves. The simple leaves are categorized based on the leaf blade division associated with venation into palmately divided (e.g. Alchemilla), pinnately divided (e.g. Achillea millefolium), forked (e.g. Batrachium, Ceratophyllum and Utricularia) and pedate (e.g. Helleborus). The categorization is based on well-developed leaves. In many taxa, transitions occur between simple leaves with a dentate or serrate margin, and simple divided (pinnately or palmately lobed) leaves. Only the leaves with the lamina divided to at least one-quarter of their width are considered as divided. Many taxa with varying leaf division are assigned to more than one character state.

The compound leaves are divided into palmate and pinnate. The taxa that have both ternate and pinnate leaves, the latter with two pairs of leaflets (e.g. Aegopodium podagraria and some other species of the Apiaceae family), are assigned to both character states. The degree of division in pinnately compound leaves indicated here relates to well-developed leaves, especially to the basal part of the lamina. Taxa with multiple pinnately compound leaves are assigned to two or more character states based on the level of division, but very small leaves, which may correspond to simple leaves, are not considered.

In many cases, there are transitions between simple and compound leaves, especially between pinnatisect and pinnate leaves. Leaves with linear or filiform segments, including the bi-, tri- or even more-pinnatisect or palmatisect leaves (e.g. stem leaves in Batrachium fluitans, Cardamine pratensis and the genus Seseli) are classified as simple (dissected) leaves. In contrast, leaves with broader segments attached to the rachis by a distinct constriction or a petiolule (e.g. stem leaves in Cardamine dentata or ground leaves in Pimpinella saxifraga) are classified as compound.

In heterophyllous taxa, all types of leaves are assessed, and the taxon is assigned to two or more character states. However, less divided leaves found in juvenile plants of some taxa are not considered heterophyllous. The parasitic plants with rudimentary (vestigial) leaves (e.g. Cuscuta) or the plants with phylloclades replacing the vestigial leaves (e.g. Asparagus) are assigned the character state “reduced”.

The information was extracted mainly from the descriptions in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). In uncertain cases, mainly for alien taxa, additional sources were consulted, including the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994) and the Flora of Pakistan (www.tropicos.org/Project/Pakistan).

Categories

• simple – entire
• simple – palmately divided
• simple – pinnately divided
• simple – forked
• simple – pedate
• compound – ternate
• compound – palmate (5-foliate)
• compound – palmate (7-foliate)
• compound – palmate (8- and more-foliate)
• compound – imparipinnate
• compound – paripinnate
• compound – interruptedly pinnate
• compound – bipinnate
• compound – tripinnate
• compound – quadripinate
• reduced

Data source and citation

Grulich V., Holubová D., Štěpánková P. & Řezníčková M. (2017) Leaf shape. – www.pladias.cz.

Further references

Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

Stipules, i.e. paired leaflike appendages at the base of the petiole or sessile leaf blade, can be present or absent. Caducous stipules, i.e. those disappearing soon after the leaf blade has developed (e.g. Prunus), are considered as present. The interpetiolar stipules, morphologically indistinguishable from true leaves and together forming whorls (e.g. Rubiaceae), are considered as true stipules. In contrast, stipules modified into glands (e.g. Lotus) or hairs (e.g. Portulacaceae) are not considered as stipules here.

Information about the presence of stipules was extracted from the descriptions in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). In cases of uncertainties, mainly concerning alien taxa, descriptions in the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994) and the Flora of Pakistan (www.tropicos.org/Project/Pakistan) were consulted.

Categories

• present
• absent

Data source and citation

Grulich V., Holubová D., Štěpánková P. & Řezníčková M. (2017) Stipules. – www.pladias.cz.

Further references

Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

Leaf petiole can be present or absent. In some plants, it can be present in some leaves but absent in others. The data were extracted from the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010), the Key to the Flora of the Czech Republic (Kubát et al. 2002), the New Hungarian Herbal (Király et al. 2011) and the Excursion Flora of Germany (Jäger & Werner 2000).

Categories

• present
• mainly present
• both present and absent
• mainly absent
• absent

Data source and citation

Prokešová H. & Grulich V. (2017) Petiole. – www.pladias.cz.

Further references

Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Jäger E. J. & Werner K. (eds) (2000) Rothmaler, Exkursionsflora von Deutschland. Band 3. Gefäßpflanzen: Atlasband. Ed. 10. – Spectrum Akademischer Verlag, Heidelberg & Berlin.
Király G., Virók V. & Molnár V. (eds) (2011) Új Magyar füvészkönyv. Magyarország hajtásos növényei: ábrák [New Hungarian Herbal. The vascular plants of Hungary: Figures]. – Aggteleki Nemzeti Park Igazgatóság, Jósvafő.
Kubát K., Hrouda L., Chrtek J. Jr., Kaplan Z., Kirschner J. & Štěpánek J. (eds) (2002) Klíč ke květeně České republiky [Key to the flora of the Czech Republic]. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.

Leaf life span is a functional trait important for plant competitiveness. It depends on the climate in the distribution range of the taxon and microclimate, nutrient and light availability in typical habitats of the taxon. The data were taken from the BiolFlor database (Klotz & Kühn 2002).

Categories

• overwintering green – leaves developing in autumn, overwintering green and decaying in spring and summer
• spring green – leaves green from early spring to early summer, then usually decaying
• summer green – leaves green in the warm season
• evergreen – leaves green throughout the year, often living for more than one year (persistent-green)

Categories

• overwintering green
• spring green
• summer green
• evergreen

Data source and citation

Klotz S. & Kühn I. (2002) Blattmerkmale. – In: Klotz S., Kühn I. & Durka W. (eds), BIOLFLOR: eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 119–126.

Leaf anatomy is an important ecological adaptation which helps plants to optimize photosynthesis under various environmental conditions. It reflects especially the availability of water (Klotz & Kühn 2002). Succulent and scleromorphic leaves are adapted to dry conditions. Both of them have thickened epidermis and cuticle, but the former develop a water-storage tissue while the latter have mechanisms to promote water transport in periods of water availability. Mesomorphic leaves are adapted to less dry conditions; hygromorphic leaves to shady conditions that rarely suffer from drought; helomorphic leaves to oxygen deficiency in swampy soils; and hydromorphic leaves to gas exchange in the water. The most common type in the Czech flora is mesomorphic leaves. The data were taken from the BiolFlor database (Klotz & Kühn 2002), which contains an extended and corrected version of the dataset published by Ellenberg (1979).

Categories

• succulent
• scleromorphic
• mesomorphic
• hygromorphic
• helomorphic
• hydromorphic

Data source and citation

Klotz S. & Kühn I. (2002) Blattmerkmale. – In: Klotz S., Kühn I. & Durka W. (eds), BIOLFLOR: eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 119–126.

Further references

Ellenberg H. (1979) Zeigerwerte der Gefäßpflanzen Mitteleuropas. Ed. 2. – Scripta Geobotanica 9: 1–122.

The months of the beginning and end of flowering in the Czech Republic are given. The data were taken from the Key to the Flora of the Czech Republic (Kaplan et al. 2019).

Data source and citation

Kaplan Z., Danihelka J., Chrtek J. Jr., Kirschner J., Kubát K., Štěpánek J. & Štech M. (eds) (2019) Klíč ke květeně České republiky [Key to the flora of the Czech Republic]. Ed. 2. – Academia, Praha.

Flower colour is reported for nearly all angiosperms except duckweeds (Araceae p. p.) and some hybrids for which data on flower colour were not available.

If a species has more than one flower colour, all colours are reported irrespective of their frequency. This approach is used both for species that regularly form populations with different flower colours (e.g. Corydalis cava and Iris pumila) and for species with occasional occurrence of deviating flower colour (e.g. albinism in Salvia pratensis or pink flowers in Ajuga reptans). However, the whole range of variation is not fully reported in cultivated plants, for which some cultivars of different colour may be ignored (e.g. Gladiolus hortulanus and Callistephus chinensis). In plants with flowers of two colours (e.g. Cypripedium calceolus), both colours are reported. In plants with multi-coloured flowers (e.g. the variegated lip in Ophrys apifera) the predominant colour is reported.

If the flower has a well-developed perianth, the reported flower colour relates to the corolla or the tepals of the homochlamydeous perianth. If such a flower has bracts of a contrasting colour (e.g. Melampyrum nemorosum), their colour is not considered. If the corolla or the homochlamydeous perianth is not developed, the flower colour is based on the calyx (e.g. Daphne mezereum), bracts (e.g. Aristolochia clematitis), the system of bracts and bracteoles in the inflorescence (Euphorbia) or the involucre on secondary peduncles (Bupleurum longifolium). In species of Araceae with spadix and spathe of contrasting colours (e.g. Calla palustris) both colours are reported. The colour of the whole inflorescence is reported for some plants with reduced flowers (e.g. Betula, Salix, some Cyperaceae and Typhaceae). Spikelets in Poaceae are reported as green disregarding a possible violet tint; exceptions include the Melica ciliata agg. and Cortaderia that are reported as white. Also in other, rare cases, the inflorescence colour is reported as flower colour (e.g. green in Ficus carica). In Asteraceae, the colours of the disk flowers and ray flowers are reported separately if the ray flowers are developed and have a contrasting colour (e.g. Bellis perennis). The colour of the involucrum is reported for species with tiny flower heads and indistinct flowers (e.g. Artemisia campestris and Xanthium) and for “immortelles” (e.g. Helichrysum and Xeranthemum).

Information on flower colour is partly based on the field knowledge, partly obtained from various photographs and descriptions in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). In the taxa that are not reported in the Flora of the Czech Republic, as well as in unclear cases (especially in alien species), other sources were used, especially the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994) and the Flora of Pakistan (http://www.tropicos.org/Project/Pakistan).

Categories

• white (including grey and silvery, and rare cases of individuals with white colour) – e.g. ray flowers of Leucanthemum vulgare, albinotic plants of Glechoma hederacea, catkins of Salix caprea
• yellow-white (including white-yellow and cream) – e.g. Scabiosa ochroleuca
• green-white (including white-green and greenish) – e.g. Orthilia secunda
• green – e.g. Poa pratensis (the colour relates to the glumes and lemmas)
• yellow-green (including green-yellow) – e.g. Acer pseudoplatanus, Rhamnus cathartica
• yellow – e.g. Taraxacum
• orange – e.g. Pilosella aurantiaca
• pink (including white-pink, pink-white and dark pink) – e.g. Malva alcea, Rosa canina
• pink-violet – e.g. Allium schoenoprasum
• red – e.g. Papaver rhoeas
• red-violet (includes all the hues of purple, pink-red and violet-red) – e.g. Astragalus onobrychis, Cirsium palustre
• violet (including dark violet and black-violet) – e.g. Bartsia alpina, Salvia verticillata
• blue – e.g. Centaurea cyanus
• blue-violet – e.g. Aconitum plicatum
• brown (including yellow-brown, brown-yellow, beige and brown-violet) – e.g. Euonymus verrucosus, Neottia nidus-avis
• red-brown – e.g. Asarum europaeum, Scrophularia nodosa
• black – e.g. Carex acuta (the colour relates to the colour of bracts)

Categories

• white
• yellow-white
• green-white
• green
• yellow-green
• yellow
• orange
• pink
• pink-violet
• red
• red-violet
• violet
• blue
• blue-violet
• brown
• red-brown
• black

Data source and citation

Štěpánková P. & Grulich V. (2019) Flower colour. – www.pladias.cz.

Further references

Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

Flowers of angiosperms are either zygomorphic (with bilateral symmetry) or actinomorphic (with radial symmetry). This character is not reported for taxa with achlamydeous flowers and taxa with strongly reduced or rudimentary perianth or with a perianth modified into scale-like or setaceous structures. However, it is reported for taxa with the perianth reduced to a corolla-like calyx (e.g. Aizoaceae and Daphne) and in taxa with flowers surrounded by complex structures combining bracts with the proper perianth or petal-like staminodes and stamens (e.g. Canna). Spiral and spirocyclic flowers, though actually asymmetric, are classified as actinomorphic in Nymphaeaceae and most species of Ranunculaceae. In contrast, in some other members of Ranunculaceae (e.g. Aconitum and Delphinium), they are classified as zygomorphic. Bisymmetric flowers (in the Brassicaceae family and the genera Dicentra and Lamprocapnos) are consistently classified as actinomorphic. Both zygomorphic and actinomorphic flowers are reported for taxa with both symmetry types (e.g. Succisa pratensis).

The information about flower symmetry was extracted from the descriptions in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). If some uncertainty occurred, particularly in some alien taxa, the descriptions in the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994) and the Flora of Pakistan (www.tropicos.org/Project/Pakistan) were consulted.

Categories

• actinomorphic
• zygomorphic

Data source and citation

Grulich V., Holubová D., Štěpánková P. & Řezníčková M. (2017) Flower symmetry. – www.pladias.cz.

Further references

Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

Perianth (perigon), i.e. the non-reproductive part of the angiosperm flower, can be classified into heterochlamydeous and homochlamydeous. Heterochlamydeous flowers are divided into calyx and corolla. In homochlamydeous flowers, calyx and corolla are indistinguishable. Perianth or some of its parts can be reduced or absent; flowers with no perianth are called achlamydeous.

In Apiaceae, the presence of the calyx teeth is assessed as a reduced calyx; if these teeth are not visible, the calyx is considered as absent. In Asteraceae, the presence of a pappus, scales or a collar-like structure is considered as a reduced calyx; if no such structures are present, the calyx is considered as absent. In Cyperaceae, the presence of perianth bristles is assessed as a reduced perianth. All members of the Poaceae family are considered as plants with a reduced perianth. The perianth in the genus Basella is arbitrarily classified as a reduced calyx though it is also often considered as a reduced homochlamydeous perianth. The character states “homochlamydeous, sometimes absent” and “homochlamydeous, reduced or absent” mean that in one plant some flowers may have a well-developed or reduced perianth, while other flowers may be achlamydeous (e.g. Atriplex).

The information was extracted mainly from the descriptions in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). For the taxa not treated in that flora or if uncertainties occurred, mainly concerning some alien taxa, the descriptions in the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994) and the Flora of Pakistan (www.tropicos.org/Project/Pakistan) were consulted.

Categories

• homochlamydeous
• homochlamydeous, sometimes reduced
• homochlamydeous, sometimes reduced or absent
• homochlamydeous, sometimes absent
• homochlamydeous, reduced or absent
• calyx and corolla
• calyx and corolla, corolla reduced or absent
• calyx and corolla, corolla sometimes absent
• calyx present, corolla sometimes reduced
• calyx present, corolla reduced
• calyx present, corolla reduced or absent
• calyx present, corolla sometimes absent
• calyx present, corolla absent
• calyx reduced, corolla present
• calyx sometimes absent, corolla present
• calyx absent, corolla present
• calyx absent, corolla sometimes present
• reduced
• reduced or absent
• flower achlamydeous

Data source and citation

Grulich V., Prokešová H. & Štěpánková P. (2017) Perianth type. – www.pladias.cz.

Further references

Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

This characteristic of angiosperm flowers is assessed either as a fusion of the corolla or, in homochlamydeous taxa (e.g. Amaryllidaceae, Liliaceae and Orchidaceae) as a fusion of the whole perianth. It is not assessed in achlamydeous groups (e.g. Salix) and plants with a strongly reduced or rudimentary perianth or with the perianth modified in scale-like or setaceous structures with a varying number of bristles, which may be free (e.g. in Cyperaceae) or partially fused (e.g. in most of Poaceae). The perianth of such plants is considered as reduced. The perianth in the genus Aristolochia is also classified as reduced (neither fused nor free): it is modified to scales situated at the bottom of a tube-like structure formed by fused bracts. Both primary character states are assigned to the taxa with unisexual male and female flowers that differ in the fusion of the perianth (e.g. Cannabis). A similar approach is used in the taxa in which some flowers are homochlamydeous while others are achlamydeous (e.g. Atriplex).

The basic information was extracted from the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). If some uncertainty occurred, especially for alien taxa, other sources were consulted, including the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994) and the Flora of Pakistan (www.tropicos.org/Project/Pakistan).

Categories

• free
• fused
• reduced

Data source and citation

Grulich V., Holubová D., Štěpánková P. & Řezníčková M. (2017) Perianth fusion. – www.pladias.cz.

Further references

Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

The calyx of angiosperm flowers can be fused into a calyx tube (synsepalous calyx) or composed of distinct sepals (aposepalous). In some plants (especially in Asteraceae) the calyx is modified into a ring of fine feathery hairs called the pappus. Taxa with both synsepalous and aposepalous calyx (e.g. Platanus) are classified as “synsepalous and aposepalous”. A cup-shaped tube formed of fused sepals, petals and stamens is called hypanthium. However, hypanthium may also be interpreted as a product of an intercalary growth of the floral axis (receptacle) up and around the carpels, forming a cup-shaped structure, sometimes even fusing with the outer walls of the carpels and making the ovary inferior. In most genera of the Onagraceae family, the hypanthium forms a floral tube fairly overtopping the apex of the ovary.

The data were taken from the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010), the Key to the Flora of the Czech Republic (Kubát et al. 2002), the New Hungarian Herbal (Király et al. 2011) and the Excursion Flora of Germany (Jäger & Werner 2000).

Categories

• aposepalous
• fused at the base
• synsepalous and aposepalous
• synsepalous
• pappus
• hypanthium

Data source and citation

Prokešová H. & Grulich V. (2017) Calyx fusion. – www.pladias.cz.

Further references

Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Jäger E. J. & Werner K. (eds) (2000) Rothmaler, Exkursionsflora von Deutschland. Band 3. Gefäßpflanzen: Atlasband. Ed. 10. – Spectrum Akademischer Verlag, Heidelberg & Berlin.
Király G., Virók V. & Molnár V. (eds) (2011) Új Magyar füvészkönyv. Magyarország hajtásos növényei: ábrák [New Hungarian Herbal. The vascular plants of Hungary: Figures]. – Aggteleki Nemzeti Park Igazgatóság, Jósvafő.
Kubát K., Hrouda L., Chrtek J. Jr., Kaplan Z., Kirschner J. & Štěpánek J. (eds) (2002) Klíč ke květeně České republiky [Key to the flora of the Czech Republic]. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.

Inflorescence types follow the morphological system used in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). As the Czech terminology used for inflorescences does not match the English terminology, we use Latin terms in the English version of the Pladias Database. The exact identification of the inflorescence type is often equivocal because of varying interpretations of the same object. In species with unisexual flowers, male and female flowers can occur in different inflorescence types. In other cases, it is not possible to identify the inflorescence without detailed knowledge of evolutionary morphology, e.g. umbella vs pseudumbella in the genus Butomus. There are also compound inflorescences, in some cases with very different structure of their parts, especially in Asteraceae, which can have even triple inflorescences (e.g. Echinops sphaerocephalus often has an anthella ex capitulis anthodiorum composita).

The information was extracted mainly from the descriptions in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). For the taxa not treated in that flora or if some uncertainties occurred, mainly concerning some alien taxa, information was taken from the descriptions in the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994) and the Flora of Pakistan (www.tropicos.org/Project/Pakistan). In critical groups (e.g. Rubus), especially in recently described species, inflorescence type was taken from the original descriptions.

Categories

• pseudumbella e cyathiis composita
• capitulum
• capitulum e floribus masculis compositum
• capitulum e spiculis compositum
• capitulum e verticillastris compositum
• capitulum e floribus femineis compositum
• capitulum ex anthodiis compositum
• racemus
• racemus e capitulis compositus
• racemus ex corymbis anthodiorum compositus
• racemus e spiculis compositus
• racemus e verticillastris compositus
• racemus ex umbellis compositus
• racemus e floribus masculis compositus
• racemus e floribus femineis compositus
• racemus e fasciculis compositus
• racemus ex anthodiis compositus
• racemus ex anthodiis masculis compositus
• racemus e cincinnis compositus
• corymbothyrsus
• corymbothyrsus e fasciculis compositus
• corymbothyrsus ex fasciculis anthodiorum compositus
• corymbothyrsus ex anthodiis compositus
• corymbus
• corymbus ex anthodiis compositus
• amentum
• amentum e floribus masculis
• amentum e floribus femineis
• spica
• spica e spiculis composita
• spica e floribus masculis composita
• spica e floribus femineis composita
• spicula
• anthella
• anthella ex capitulis anthodiorum composita
• anthella e spiculis composita
• anthella e floribus masculis composita
• anthella ex anthodiis composita
• flores solitarii
• flores solitarii masculi
• flores solitarii feminei
• panicula
• panicula e capitulis composita
• panicula ex capitulis anthodiorum composita
• panicula e corymbis composita
• panicula e spiculis composita
• panicula e spiculis masculis composita
• panicula e pseudospicis composita
• panicula e floribus masculis composita
• panicula e fasciculis composita
• panicula e bostrychibus composita
• panicula ex anthodiis composita
• panicula e dichasiis composita
• panicula e cincinnis composita
• pseudospica
• pseudospica e capitulis composita
• pseudospica e spiculis composita
• pseudospica e verticillastris composita
• pseudospica e floribus masculis composita
• pseudospica ex anthodiis composita
• pseudumbella
• pseudumbella ex anthodiis composita
• verticillastrum
• pseudoracemus
• umbella
• umbella e spicis spicularum composita
• spadix
• spadix e floribus femineis compositus
• umbella composita
• fasciculus
• fasciculus e floribus masculis compositus
• fasciculus e floribus femineis compositus
• fasciculus ex anthodiis femineis compositus
• syconium
• strobilus
• bostryx
• anthodium
• anthodium solitarium
• rhipidium
• dichasium
• dichasium e floribus femineis compositum
• dichasium ex anthodiis compositum
• cincinnus

Data source and citation

Grulich V. & Štěpánková P. (2019) Inflorescence type. – www.pladias.cz.

Further references

Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

Dicliny characterizes the level of spatial separation of male and female reproductive organs. Monoclinous (synoecious) plants, including most taxa of the central-European flora, have only bisexual (hermaphroditic) flowers. The plants with unisexual flowers are either monoecious (with both male and female flowers growing on the same individual) or dioecious (with male and female flowers growing on different individuals). Gynomonoecious plants have female and bisexual flowers on the same individuals, while andromonoecious plants have male and bisexual flowers on the same individuals. Gynodioecious plants have female and bisexual flowers on different individuals, or some individuals have only female flowers, and other individuals have both male and female flowers. Androdioecious plants have male and bisexual flowers on different individuals, or some individuals have only male flowers, and other individuals have both male and female flowers. Trioecious plants have individuals with male flowers, individuals with female flowers, and individuals with bisexual (or both male and female unisexual) flowers. Trimonoecious plants have a male, female and bisexual flowers on the same individual. Other plants can be male sterile. The data on dicliny were taken from the BiolFlor database (Durka 2002).

Categories

• synoecious
• monoecious
• dioecious
• gynomonoecious
• andromonoecious
• gynodioecious
• androdioecious
• trioecious
• trimonoecious
• male sterile

Data source and citation

Durka W. (2002) Blüten- und Reproduktionsbiologie. – In: Klotz S., Kühn I. & Durka W. (eds), BIOLFLOR – Eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 133–175.

Pollen is transferred to stigma by different vectors, including abiotic vectors such as wind (anemophily) or water (hydrophily), or biotic vectors such as insects (entomophily). An alternative mechanism is selfing (autogamy), which can include special mechanisms such as cleistogamy (selfing in rudimentary, obligatorily autogamous flowers), pseudocleistogamy (selfing in flowers that do not open due to adverse environmental conditions) or geitonogamy (selfing by pollen from a neighbouring flower of the same plant except the cases of pollen transfer by a vector). Pollination syndromes are adopted from the BiolFlor database (Durka 2002).

Categories

• wind-pollination
• water-pollination
• insect-pollination
• selfing
• cleistogamy
• pseudocleistogamy
• geitonogamy

Data source and citation

Durka W. (2002) Blüten- und Reproduktionsbiologie. – In: Klotz S., Kühn I. & Durka W. (eds), BIOLFLOR – Eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 133–175.

The primary classification of fruit types is into dry and fleshy. Within each of these two groups, fruit types are further classified based on the scheme outlined in the first volume of the Flora of the Czech Republic (Slavíková 1988), which consistently uses the typological method. This means that fruits are classified based purely on their morphology following the formal definitions of the fruit type, regardless of the fruit type found in closely related species or genera.

One-seeded fruits in Brassicaceae (e.g. Crambe) are classified as achenes, not siliculas. Indehiscent two- and more-seeded fruits in the same family, breaking mainly in constrictions (e.g. in Bunias and Raphanus), are consistently classified as a loment, even if the fruit breaks into two distinct parts, of which one is one-seeded and the other, of strikingly different shape, two- or more-seeded and dehiscent, such as in Rapistrum rugosum. A similar approach is used for the classification of fruits in Fabaceae. Dehiscent fruits of most taxa are classified as legumes, while indehiscent two- and more-seeded fruits breaking into single-seeded parts (e.g. in Hippocrepis and Securigera) are classified as loments. One-seeded indehiscent fruits (e.g. in Onobrychis and Trifolium) are classified as achenes. Two- or more-seeded indehiscent fruits (e.g. in Sophora japonica and Vicia faba) are also classified as legumes. The fruits of all Euphorbia species are classified as capsules, although in some cases the seeds are not released. Fleshy false fruits of the genera Basella, Ficus, Maclura, Morus, Nuphar and Nymphaea are merged into a separate category.

The information about fruit type was extracted mainly from the descriptions in the Flora of the Czech Republic (vols. 1–8; Hejný et al. 1988–1992, Slavík et al. 1997–2004, Štěpánková et al. 2010). For the taxa not treated in that flora or in case of uncertainties, especially regarding alien taxa, descriptions in the Flora of North America (Flora of North America Editorial Committee 1993), the Flora of China (Wu et al. 1994), the Flora of Pakistan (www.tropicos.org/Project/Pakistan), and Flora Iberica (Castroviejo et al. 1986; mainly for the Fabaceae family) were consulted.

Categories

• dry fruit – disciform breaking into mericarps
• dry fruit – pair of nutlets
• dry fruit – cremocarp
• dry fruit – double samara
• dry fruit – legume
• dry fruit – follicle
• dry fruit – achene/cypsela/samara
• dry fruit – nut enclosed in an utricle
• dry fruit – caryopsis
• dry fruit – nut
• dry fruit – schizocarp
• dry fruit – cluster of follicles
• dry fruit – head of achenes
• dry fruit – lomentum/transversely dehiscent siliqua
• dry fruit – siliqua
• dry fruit – silicula
• dry fruit – capsule
• dry fruit – cluster of four one-seeded nutlets
• dry fruit – dry schizocarp with an apical beak
• fleshy fruit – berry
• fleshy fruit – pome
• fleshy fruit – drupe
• fleshy fruit – head of one-seeded drupes
• fleshy fruit – hip
• fleshy fruit – special type

Data source and citation

Grulich V., Holubová D., Štěpánková P. & Řezníčková M. (2017) Fruit type. – www.pladias.cz.

Further references

Castroviejo S., Laínz M., López González G., Montserrat P., Muńoz Garmendia F., Paiva J. & Villar L. (eds) (1986) Flora Iberica. Plantas vasculares de la Península Ibérica e Islas Baleares. – Real Jardín Botánico, Madrid.
Flora of North America Editorial Committee (eds) (1993) Flora of North America North of Mexico. – Oxford University Press, New York.
Flora of Pakistan. – http://www.tropicos.org/Project/Pakistan
Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Slavíková Z. (1988) Terminologický slovník [Terminological dictionary]. – In: Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds), Květena České socialistické republiky [Flora of the Czech Socialist Republic] 1: 130–153, Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.
Wu Z., Raven P. H. & Huang D. (eds) (1994) Flora of China. – Science Press, Beijing & Missouri Botanical Garden, St. Louis.

Reproduction is the production of offspring that are physically separated from the parental plant. Plants reproduce either by seed (or spores) or vegetatively, while the combination of these two types of reproduction in the same taxon is common. Asexual seed production (apomixis) is not considered as vegetative reproduction. The data were taken from the BiolFlor database (Durka 2002).

Categories

• only vegetatively
• mostly vegetatively, rarely by seed/spores
• by seed/spores and vegetatively
• mostly by seed/spores, rarely vegetatively
• only by seed/spores

Data source and citation

Durka W. (2002) Blüten- und Reproduktionsbiologie. – In: Klotz S., Kühn I. & Durka W. (eds), BIOLFLOR – Eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 133–175.

Diaspore, also called dispersule or propagule, is a generative or vegetative part of the plant body that is dispersed from the parental plant and can produce a new individual. Generative diaspores include spores, seeds and fruits or similar dispersal units (e.g. aggregate fruits in Fragaria, multiple fruits in Morus, gymnosperm cones, epimatium-bearing seed in Taxus, spikelets or their various fragments in Poaceae). If the seed is released from dehiscent fruit or decaying ripe fleshy fruit, both seed and fruit can be considered as diaspores. In plants with indehiscent fruits, only the fruit is considered as a diaspore. A specific category of generative diaspore is tumbleweeds, i.e. mature plant parts including stem branches and large inflorescence (e.g. Crambe tataria and Falcaria vulgaris).

Vegetative diaspores are viable and movable parts of plants that originate above ground or in water and disconnect from the parent plant before sprouting. We did not consider as vegetative diaspores clonal organs connected with the maternal plant until the new plant becomes independent (e.g. stolons in Fragaria) and various types of below-ground organs or shoot bases embedded in soil (e.g. tubers of Helianthus tuberosus or grass tillers). Vegetative diaspores include (i) turions (e.g. Myriophyllum and Utricularia) and similar overwintering structures (detachable buds in Elodea and Groenlandia and shortened shoots of some pondweeds produced by rhizome or stolon, e.g. Potamogeton alpinus); (ii) bulbils and tubers of stem origin (e.g. Allium oleraceum and Dentaria bulbifera) or root origin (Ficaria only); (iii) plantlets born by pseudovivipary (e.g. Poa alpina); (iv) plantlets born from buds on leaves (e.g. Cardamine pratensis); (v) plantlets born on free ends of stolons, detachable before establishing (e.g. Hydrocharis and Jovibarba); (vi) unspecialized fragments of the shoot (e.g. Sedum album and many aquatic plants), shoot tips (e.g. Ceratophyllum demersum) or detachable offsprings born from axillary buds (e.g. Agrostis canina, Arabidopsis halleri and Rorippa amphibia); (vii) budding plants (Lemnaceae only); and (viii) gemmae produced by gametophytes (Trichomanes speciosum only).

Categories

• spore
• seed
• fruit, infrutescence or its part
• tumbleweed
• turion
• bulbil or tuber
• pseudovivipary
• leaf-born plantlet
• stolon-born plantlet
• shoot fragment
• budding
• gametophyte-gemma

Data source and citation

Sádlo J., Chytrý M., Pergl J. & Pyšek P. (2018) Plant dispersal strategies: a new classification based on themultiple dispersal modes of individual species. – Preslia 90: 1–22.

Plants use different dispersal modes, also called dispersal syndromes, depending on different dispersal vectors. For example, anemochory is the dispersal by wind, hydrochory by water, epizoochory by attachment to an animal body and endozoochory by animals via ingestion. However, single plant species usually use a combination of several dispersal modes rather than a single mode. Distinct combinations of dispersal modes repeatedly occurring in different plant taxa are called dispersal strategies. Sádlo et al. (2018) distinguished nine dispersal strategies named for the genus names of typical representatives. Taxa of the Czech flora are assigned to individual strategies based on this source.

Categories

• Allium type – mainly autochory, less frequently anemochory, endozoochory and epizoochory. This is the most common dispersal strategy, including about 56% taxa of the Czech flora. About half of the included taxa are dispersal generalists lacking a clear morphological indication of anemochory or zoochory. Most myrmecochorous or probably myrmecochorous species are also assigned to this category.
• Bidens type – mainly autochory and epizoochory, less frequently endozoochory. This dispersal strategy is characterized by two essential dispersal modes, of which autochory is the more important, despite the presence of morphological structures indicating epizoochory.
• Cornus type – mainly autochory and endozoochory. Herbaceous plants, shrubs and small trees with fleshy fruit, often of the Rosaceae family, typically have this strategy. Furthermore, tall trees bearing large, heavy and nutrient-rich seeds are also included.
• Epilobium type – mainly anemochory and autochory, less frequently endozoochory and epizoochory. This dispersal strategy is typical of taxa growing in mesic and dry habitats.
• Lycopodium type – mainly anemochory, less frequently autochory, endozoochory, epizoochory and hydrochory. This dispersal strategy relies on light, very small spores and seeds that are dispersed, besides wind, by a wide range of vectors. Compared to other strategies, the role of autochory is small.
• Phragmites type – mainly anemochory and hydrochory, less frequently autochory, endozoochory and epizoochory. Wetland taxa with light diaspores (both seeds and fruits) equipped with a hairy flying apparatus. Most of the taxa with this dispersal strategy lack vegetative diaspores. Woody plants, stout clonal graminoids and herbaceous plants are typical growth forms associated with this dispersal strategy.
• Sparganium type – mainly autochory and hydrochory, less frequently endozoochory and epizoochory. This dispersal strategy is a wetland analogue of the Wolffia type, assigned to aquatic plants. It applies mainly to monocotyledonous taxa producing achenes with good buoyancy and with vegetative diaspores having an important role.
• Wolffia type – mainly hydrochory, less frequently endozoochory and epizoochory. This dispersal strategy is typical of aquatic macrophytes spread by fruit, seed or spores. However, vegetative reproduction dominates in most cases, including stem fragmentation, the formation of stolons or, in Lemnaceae, budding colonies.
• Zea type. Taxa with this dispersal strategy rarely or never disperse by generative diaspores and do not form vegetative aboveground diaspores.

Categories

• Allium (mainly autochory)
• Bidens (mainly autochory and epizoochory)
• Cornus (mainly autochory and endozoochory)
• Epilobium (mainly anemochory and autochory)
• Lycopodium (mainly anemochory)
• Phragmites (mainly anemochory and hydrochory)
• Sparganium (mainly autochory and hydrochory)
• Wolffia (mainly hydrochory)
• Zea (no dispersal)

Data source and citation

Sádlo J., Chytrý M., Pergl J. & Pyšek P. (2018) Plant dispersal strategies: a new classification based on themultiple dispersal modes of individual species. – Preslia 90: 1–22.

Shoot metamorphoses are modifications of the shoot that involve the development of different structures for special tasks such as vegetative spread or storage. Data about shoot metamorphoses are adopted from the BiolFlor database (Krumbiegel 2002).

Categories

• stolon – lateral shoot (exceptionally the main shoot) with long thin internodes and adventitious roots; separation from the mother plant causes the formation of individual ramets
• stolon with tuberous tip – subterranean stolon with tuberous swelling of several internodes at the distal end, which mostly develops at the end of the growing season for storing nutrients; aboveground shoots develop from the tuber in the following season
• stolon with bulbous tip – subterranean stolon with a bulbous tip at the distal end; aboveground shoots develop from the bulb in the following season
• rhizome – subterranean or surface-close, mostly thickened shoot living for more than one year, bearing adventitious roots, buds and usually also cataphylls (tiny reduced leaves); it has both spreading and storing function
• stolon-like rhizome – rhizome with longer internodes that has mainly the spreading function
• pleiocorm – a system of compact, perennial shoots at the proximal end of the persistent primary root; the innovation shoots arise from the buds in the axils of basal leaves, and the connections between the shoots and the primary root are persistent
• rhizome-like pleiocorm – a pleoicorm in which the first innovation shoots arise from the basal leaf axils, but later shoots arise from rhizome-like, adventitiously rooted shoots, which later lose their connection with the primary root
• shoot tuber – thickened, mostly subterranean part of a shoot, living for less than one year and used for storage
• bulb – compressed part of a shoot with cataphyll leaves or leaf bases, used for storage or vegetative propagation
• bulbil – compressed aboveground lateral shoot with poorly developed or still absent organs, which develops into a new plant after separation from the mother plant
• brood shoot – spikelet of Poaceae transformed into a tiny shoot, which develops into a new plant after separation from the mother plant
• turion – compressed, mostly bud-like vegetative shoot, which hibernates with leaves or leaf parts and sprouts only after separation from the mother plant
• shoot thorn – prickly structure rich in strengthening tissue, mostly at the position of a lateral shoot
• shoot tendril – thread-like, ramified or non-ramified shoot used for plant attachment to supporting structures
• shoot succulence – the presence of a large amount of water-storing tissue causing fleshy thickening of shoots
• assimilating shoot – shoot used for assimilation instead of or in addition to leaves

Categories

• stolon
• stolon with tuberous tip
• stolon with bulbous tip
• rhizome
• stolon-like rhizome
• pleiocorm
• rhizome-like pleiocorm
• shoot tuber
• bulb
• bulbil
• brood shoot
• turion
• shoot thorn
• shoot tendril
• shoot succulence
• assimilating shoot

Data source and citation

Krumbiegel A. (2002) Morphologie der vegetativen Organe (außer Blätter). – In: Klotz S., Kühn I. & DurkaW. (eds), BIOLFLOR: eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 93–118.

Plant parasitism is based on either of two mechanisms. The first group of parasitic plants involves those parasitizing directly on another plant. These plants are called haustorial parasites. They take resources from the host’s vascular bundles using a specialized organ, the haustorium. The second group comprises mycoheterotrophic plants, which parasitize fungi via mycorrhizal interaction and gain organic carbon from them.

Plants in both groups display variable dependence on their host organism. The haustorial parasites include two distinct functional groups: green hemiparasites and holoparasites. Green hemiparasites are partial parasites that retain photosynthetic ability but obtain all mineral resources and a part of the organic carbon from the host. Holoparasites are non-green full parasites unable to photosynthesize. Location of the haustorial attachment to the host (root or stem) is another essential functional trait. The distinction between partial and full parasitism in haustorial parasites may not be straightforward. In the Czech flora, it is nevertheless possible to distinguish between stem hemi- and holoparasites, which are difficult to separate on the global scale (Těšitel 2016). Consequently, we use a traditional classification here and classify as holoparasites those plants that are in adulthood mostly without chlorophyll, even though some of them might have some chlorophyll and perform residual photosynthesis (e.g. Cuscuta).

In mycoheterotrophic plants, there is a continuum from initial mycoheterotrophs through partial mycoheterotrophs to full mycoheterotrophs. In the initial mycoheterotrophs, only initial stages, i.e. gametophytes or seedlings, are dependent on the fungus, whereas adult plants are autotrophic, while still depending on mycorrhizal symbiosis as a source of water and mineral nutrients. In the partial mycoheterotrophs, photosynthesizing adults obtain from their mycorrhizal fungi not only water and mineral nutrients but also different amounts of organic carbon. The full mycoheterotrophs lost their chlorophyll and are thus fully parasitic. In some partial mycoheterotrophs (e.g. the genus Cephalanthera), chlorotic individuals can be found, which lack chlorophyll and fully depend on their hosts.

Classification of haustorial parasites follows Těšitel (2016) with a further distinction of stem hemi- and holoparasites, and identification of mycoheterotrophs follows Merckx (2012).

Categories

• autotrophic
• root hemiparasite
• stem hemiparasite
• root holoparasite
• stem holoparasite
• partial or initial mycoheterotroph
• full mycoheterotroph

Data source and citation

Těšitel J., Těšitelová T., Blažek P. & Lepš J. (2016) Parasitism and mycoheterotrophy. – www.pladias.cz.

Further references

Těšitel J. (2016) Functional biology of parasitic plants: a review. – Plant Ecology and Evolution 149: 5–20.
Merckx V. S. F. T. (2012) Mycoheterotrophy: the biology of plants living on fungi. – Springer, Berlin.

Carnivorous plants attract, trap and kill their prey, animals (mainly insects and small crustaceans) and protozoans, and subsequently absorb the nutrients from their dead bodies.

Categories

• carnivorous
• non-carnivorous

Data source and citation

Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds) (1988) Květena České socialistické republiky [Flora of the Czech Socialist Republic]. Vol. 1. – Academia, Praha.
Hejný S., Slavík B., Hrouda L. & Skalický V. (eds) (1990) Květena České republiky [Flora of the Czech Republic]. Vol. 2. – Academia, Praha.
Hejný S., Slavík B., Kirschner J. & Křísa B. (eds) (1992) Květena České republiky [Flora of the Czech Republic]. Vol. 3. – Academia, Praha.
Slavík B., Chrtek J. jun. & Štěpánková J. (eds) (2000) Květena České republiky [Flora of the Czech Republic]. Vol. 6. – Academia, Praha.
Slavík B., Chrtek J. jun. & Tomšovic P. (eds) (1997) Květena České republiky [Flora of the Czech Republic]. Vol. 5. – Academia, Praha.
Slavík B., Smejkal M., Dvořáková M. & Grulich V. (eds) (1995) Květena České republiky [Flora of the Czech Republic]. Vol. 4. – Academia, Praha.
Slavík B., Štěpánková J. & Štěpánek J. (eds) (2004) Květena České republiky [Flora of the Czech Republic]. Vol. 7. – Academia, Praha.
Štěpánková J., Chrtek J. jun. & Kaplan Z. (eds) (2010) Květena České republiky [Flora of the Czech Republic]. Vol. 8. – Academia, Praha.

Plants are classified into those without symbiotic nitrogen fixers and those that form a symbiosis with nitrogen-fixing bacteria. The latter are further divided into those forming a symbiosis with rhizobia (e.g. Allorhizobium, Bradyrhizobium, Mesorhizobium, Rhizobium and Sinorhizobium) and those forming the actinorhizal symbiosis with the genus Frankia, the latter called actinorhizal plants (Bond 1983, Pawlowski & Sprent 2007, Sprent 2008, Benson 2016).

In the Czech flora, the rhizobial group is represented by virtually all legumes (family Fabaceae). Exceptions are three non-native cultivated woody species (Cercis siliquastrum, Gleditsia triacanthos, Gymnocladus dioicus) that do not nodulate (Tedersoo et al. 2018), which is generally considered as evidence for the absence of symbiosis. However, some studies suggest that functional nitrogen-fixing symbiosis may exist even without visible nodules (Bryan et al. 1996). Roots of Gleditsia triacanthos were recorded to contain bacterial structures similar to those in nodules with rhizobia, as well as the presence of nitrogenase (Faria et al. 2002). These genera also contain genes probably related to nodule formation, although their exact function is unclear (Graves et al. 1999). Because convincing evidence of nitrogen fixation in these species is missing, we consider them non-nitrogen-fixing for the time being.

Symbiosis with rhizobia was found in several other families (Tedersoo et al. 2018). Of these, the Czech flora includes only casually introduced Tribulus terrestris (Zygophyllaceae), in which a parallel infection with cyanobacteria was described (Sabet 1946, Mahmood & Athar 1998).

The actinorhizal group is represented in the Czech flora mainly by alder species (Alnus spp.) and also by cultivated species in the family Elaeagnaceae – Elaeagnus spp. and Hippophaë rhamnoides (Bond 1983, Benson 2016).

Categories

• symbiosis with rhizobia
• symbiosis with Frankia
• no nitrogen-fixing symbionts

Data source and citation

Blažek P. & Lepš J. (2016) Symbiotic nitrogen fixation. – www.pladias.cz.

Further references

Benson D. R. (2016) Frankia & actinorhizal plants. – https://frankia.mcb.uconn.edu/ (accessed on 1 Feb 2021).
Bond G. (1983) Taxonomy and distribution of non-legume nitrogen-fixing systems. – In: Gordon J. C. & Wheeler C. T. (eds), Biological nitrogen fixation in forests: foundations and applications, p. 55–87, Martinus Nijhoff/Dr W. Junk Publ., The Hague.
Bryan J. A., Berlyn G. P. & Gordon J. C. (1996) Toward a new concept of the evolution of symbiotic nitrogen fixation in the Leguminosae. – Plant and Soil 186: 151–159.
de Faria S. M., Olivares F. L. & Xavier R. P. (2002) Nodule-structure in the roots of Gleditsia spp. a non-nodulating legume genus. – In: Pedrosa F. O., Hungria M., Yates G. & Newton W. E. (eds), Nitrogen fixation: from molecules to crop productivity. Current plant science and biotechnology in agriculture, vol 38. Springer, Dordrecht, p. 337.
Graves W. R., Foster C. M., Rosin F. M. & Schrader J. A. (1999) Two early nodulation genes are not markers for the capacity of leguminous nursery crops to form root nodules. – Journal of Environmental Horticulture 17: 126–129.
Mahmood A. & Athar M. (1998) Cyanobacterial root nodules in Tribulus terrestris L. (Zygophyllaceae). – In: Malik K. A. & Sajjad Mirza M. & Ladha J. K. (eds), Nitrogen fixation with non-legumes, Springer, Dordrecht, p. 345–350.
Pawlowski K. & Sprent J. I. (2007) Comparison between actinorhizal and legume symbioses. – In: Pawlowski K. & Newton W. E. (eds), Nitrogen-fixing actinorhizal symbioses, Springer, Dordrecht, p. 261–288.
Sabet Y. S. (1946) Bacterial root nodules in the Zygophyllaceae. – Nature 157: 656–657.
Sprent J. I. (2008) Evolution and diversity of legume symbiosis. – In: Dilworth M. J., James E. K., Sprent J. I. & Newton W. E. (eds), Nitrogen-fixing leguminous symbioses, Springer, Dordrecht, p. 1–21.
Tedersoo L., Laanisto L., Rahimlou S., Toussaint A., Hallikma T. & Pärtel M. (2018) Global database of plants with root-symbiotic nitrogen fixation: NodDB. – Journal of Vegetation Science 29: 560–568.

Taxa are classified according to whether they are native or alien to the Czech Republic. Following the definitions used in invasion ecology, native taxa are those that have evolved in the area of the Czech Republic or immigrated there without human assistance from the area where they had evolved. Alien taxa are those whose presence is a result of intentional or unintentional introduction by human activity and can be divided based on their residence time. The alien taxa are divided based on their residence time into archaeophytes and neophytes. Archaeophytes are taxa occurring in the wild that were introduced between the beginning of Neolithic agriculture and the year 1500, i.e. the beginning of intercontinental overseas trade after the discovery of the Americas. Neophytes are taxa occurring in the wild that were introduced after 1500 (see Richardson et al. 2000 for detailed definitions). Some taxa introduced in the Late Middle Ages or Early Modern Period, but with no exact information on the introduction date, were assigned to a joint category of Archaeophyte/neophyte. Additionally, some frequently cultivated taxa that are not known to have escaped from cultivation are listed as a separate category Cultivated. Category Lack of evidence of occurrence in the wild includes taxa for which spontaneous occurrence in the wild is doubtful. Taxa assigned to the category Absent in Czechia are not sufficiently supported by reliable records or occurred just once and disappeared.

The data included in the database follow the third edition of the Catalogue of alien plants of the Czech Republic (Pyšek et al. 2022 and references related to individual taxa therein).

Categories

• native
• archaeophyte
• neophyte
• archaeophyte/neophyte
• cultivated only
• lack of evidence of occurrence in the wild
• absent in Czechia

Data source and citation

Pyšek P., Sádlo J., Chrtek J. Jr., Chytrý M., Kaplan Z., Pergl J., Pokorná A., Axmanová I., Čuda J., Doležal J., Dřevojan P., Hejda M., Kočár P., Kortz A., Lososová Z., Lustyk P., Skálová H., Štajerová K., Večeřa M., Vítková M., Wild J. & Danihelka J. (2022) Catalogue of alien plants of the Czech Republic (3rd edition): species richness, status, distributions, habitats, regional invasion levels, introduction pathways and impacts. – Preslia 94: 447–577.

Further references

Richardson D. M., Pyšek P., Rejmánek M., Barbour M. G., Panetta F. D. & West C. J. (2000) Naturalization and invasion of alien plants: concepts and definitions. – Diversity and Distributions 6: 93–107.

The floristic zones of the Earth in which the taxon occurs are defined according to Meusel et al. (1965, 1978) and Meusel & Jäger (1992). Data were taken from the BiolFlor database (Kühn & Klotz 2002).

Categories

• arctic – zone of tundra north of the arctic treeline
• boreal – zone of northern coniferous forests (taiga)
• northern temperate – northern zone of summer-green deciduous forests
• southern temperate – southern zone of summer-green deciduous forests
• submeridional – zone of summer-green dry forests and steppes
• meridional – zone of evergreen broad-leaved and coniferous forests, steppes and deserts
• subtropical – winter-dry zone with savannas and dry forests
• tropical – humid zone with evergreen broad-leaved forests
• austral or antarctic – floristic zones of the southern hemisphere corresponding to the temperate to arctic zones of the northern hemisphere

Categories

• arctic
• boreal
• northern temperate
• southern temperate
• submeridional
• meridional
• subtropical
• tropical
• austral or antarctic

Data source and citation

Kühn I. & Klotz S. (2002) Angaben zu den Arealen. – In: Klotz S., Kühn I. & DurkaW. (eds), BIOLFLOR: eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 227–239.

Further references

Meusel H. & Jäger E. (1992) Vergleichende Chorologie der zentraleuropäischen Flora. Band III. – Gustav Fischer, Jena.
Meusel H., Jäger E. & Weinert E. (1965) Vergleichende Chorologie der zentraleuropäischen Flora. Band I. – Gustav Fischer, Jena.
Meusel H., Jäger E., Rauschert S. & Weinert E. (1978) Vergleichende Chorologie der zentraleuropäischen Flora. Band II. – Gustav Fischer, Jena.

The floristic region is reported as the continent or its part in which the taxon occurs according to the taxon range maps (Meusel et al. 1965, 1978, Meusel & Jäger 1992). The categories are not discrete, and some of the regions can be included within broader regions (e.g. Western Siberia – Siberia – Asia). From a set of overlapping categories, the one that best matches the taxon geographic range or its part is reported. Data were taken from the BiolFlor database (Kühn & Klotz 2002).

Categories

• Europe
• Europe-Western Asia
• Western Europe
• Eastern Europe
• Alps
• Carpathians
• Caucasus
• Asia
• Western Asia
• Asia Minor
• Near East
• Middle Asia
• Central Asia
• Siberia
• Western Siberia
• Eastern Asia
• Africa
• Eastern Africa
• Americas
• North America
• Eastern America
• Western America
• Greenland
• Australia, New Zealand
• circumpolar

Data source and citation

Kühn I. & Klotz S. (2002) Angaben zu den Arealen. – In: Klotz S., Kühn I. & DurkaW. (eds), BIOLFLOR: eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland, Schriftenreihe für Vegetationskunde 38: 227–239.

Further references

Meusel H. & Jäger E. (1992) Vergleichende Chorologie der zentraleuropäischen Flora. Band III. – Gustav Fischer, Jena.
Meusel H., Jäger E. & Weinert E. (1965) Vergleichende Chorologie der zentraleuropäischen Flora. Band I. – Gustav Fischer, Jena.
Meusel H., Jäger E., Rauschert S. & Weinert E. (1978) Vergleichende Chorologie der zentraleuropäischen Flora. Band II. – Gustav Fischer, Jena.

The lowest and the highest elevational vegetation belt in which the taxon commonly occurs in the Czech Republic. For some taxa, also extremes are shown, i.e. elevational belts in which the taxon rarely occurs outside its main elevational range. The submontane belt comprises merged supracolline and submontane belts, and the montane belt comprises merged montane and supramontane belts according to the classification of elevational vegetation belts used in the Flora of the Czech Republic (Skalický 1988). The data were taken from the Key to the Flora of the Czech Republic (Kaplan et al. 2019).

Categories

• lowlands
• colline belt
• submontane belt
• montane belt
• subalpine belt

Data source and citation

Kaplan Z., Danihelka J., Chrtek J. Jr., Kirschner J., Kubát K., Štěpánek J. & Štech M. (eds) (2019) Klíč ke květeně České republiky [Key to the flora of the Czech Republic]. Ed. 2. – Academia, Praha.

Further references

Skalický V. (1988) Regionálně fytogeografické členění [Regional phytogeographic division]. – In: Hejný S., Slavík B., Chrtek J., Tomšovic P. & Kovanda M. (eds), Květena České socialistické republiky [Flora of the Czech Socialist Republic] 1: 103–121, Academia, Praha.