Ptilostemon is a genus of thistle in the tribe Cardueae within the family Asteraceae.Cassini, Alexandre Henri Gabriel de. 1816. Bulletin des Sciences, par la Societe Philomatique 1816: 200 in FrenchTropicos, Ptilostemon Cass.Altervista Flora Italiana, genere Ptilostemon includes photos and range maps for 6 species It includes 15 species native to the Mediterranean Basin and the Caucasus.
Species The following species are recognised in the genus Ptilostemon:Flann, C (ed) 2009+ Global Compositae Checklist
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