Helminthotheca (commonly called ox-tongue)Genus Helminthotheca page in the New York Flora Atlas, 12-20-2012 is a genus in the tribe Cichorieae of the family Asteraceae.Zinn, Johann Gottfried. 1757. Catalogus Plantarum Horti Gottingensis 430Tropicos, Helminthotheca Zinn Helminthotheca is closely related to the genus Picris, both within the Hypochaeridinae subtribe.Kilian, Gemeinholzer & Lack (2009). Systematics, Evolution, and Biogeography of Compositae. (Funk, Susanna, Stuessy & Beyer, eds.) Ch. 24. Chichorieae, pp. 349-352.Altervista Flora Italiana, genere Helminthotheca includes photos and European distribution maps
Species Helminthotheca aculeata - Italy, Algeria, Morocco, Tunisia Helminthotheca balansae - Algeria, Morocco Helminthotheca comosa - Algeria, Morocco, southern Spain, Gibraltar Helminthotheca echioides (syn. Picris echioides)Interagency Taxonomic Information System (ITIS) report for Helminthotheca echioides (L.) Holub, accessed 12-23-2012 - widespread across much of Europe and the Mediterranean from Ireland + Canary Islands to Poland + Iran; naturalized in Australia, North and South America Helminthotheca glomerata - Algeria, Tunisia, Morocco Helminthotheca spinosa - central and southern Portugal, southwestern Spain
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