(modifié de Coste, Flore de la France 1937) :
Plante annuelle ou bisannuelle, [glauque], tige de 20-30 cm;
Écologie : Lieux secs, coteaux de la région méditerranéenne, des Alpes-Maritimes aux Pyrénées-Orientales, Corse ; remonte dans la Drôme, l'Ardèche, les Hautes-Alpes, les Basses-Alpes, le Tarn, l'Aveyron, les Landes.
Répartition hors de France : Espagne. Algérie.
(modified from Butcher, British Flora 1961):
NOTE: the French text is more complete and up-to-date
A stout biennial with a much-branched stem 58-100 cm high, growing from a thick tap-root.
Ecology UK: (distribution according to flora) Its roots are sometimes cooked as a vegetable and the plant occurs as a garden outcast in many places, but not abundantly, except in S. and S.E. England.
France:
Distribution outside France: ?
Fleurs : violet foncé, beaucoup plus courtes que l'involucre (environ moitié)
Floraison France : Mai-juin.
Flowers: Involucral bracts 20-25 mm long, linear, acuminate, rather longer than the outermost florets; florets 15-20 mm long, purple, pilose at base of the ligule.
Flowering UK: Mid June-Mid Aug