This species-poor plant community dominated by Cymbalaria muralis occurs on sunny or partially shaded vertical surfaces of walls in warm areas of the Czech Republic, most frequently on castles and castle ruins, old urban fortifications, in chateau gardens, urban parks and garden suburbs. C. muralis is a species of southern European origin and occurs as an alien in the Czech Republic. In some places it has been deliberately planted but it tends to spread spontaneously to suitable habitats in its surroundings.