(modifié de Coste, Flore de la France 1937) :
[Coste -> var. de Parietaria officionalis, Parietaria ramiflora]
Plante vivace de 10-30 cm, pubescente, à souche assez forte ; tiges ascendantes ou diffuses, rameuses
Écologie : (répartition d'après la flore) Vieux murs, rochers, décombres, dans toute la France et en Corse.
Répartition hors de France : Europe ; Asie occidentale ; Afrique septentrionale.
(modified from Butcher, British Flora 1961):
NOTE: the French text is more complete and up-to-date
A small, softly hairy perennial herb with a cluster of several decumbent or spreading stems 15-25 cm high, growing from the rootstock. Stem terete, hairy.
Ecology UK: (distribution according to flora) It is widespread and sometimes common on walls and rocks in England, Wales and Ireland and very rare in Scotland.
France:
Distribution outside France: ?