(modifié de Coste, Flore de la France 1937) :
Plante vivace de 30-80 cm, dressée, à rameaux épaissis sous les capitules
Écologie : (répartition d'après la flore) Bois des terrains siliceux dans toute la France
Répartition hors de France : Europe occidentale et méridionale.
(modified from Butcher, British Flora 1961):
NOTE: the French text is more complete and up-to-date
A rather stout, much-branched perennial with grooved, roughly hairy, rather stout branches 15-100 cm high. Branches few, short, swollen under the heads.
Ecology UK: (distribution according to flora) It grows in hedgerows and grassy places very commonly throughout the whole of the British Isles.
France:
Distribution outside France: ?