Checklist » Asteraceae » Hieracium flagellare
Last updated 10/19/2020 by David Giblin.
Hieracium flagellare Willd.[FNA19, HC2]
whip hawkweed

Publication: Enum. Pl. suppl.: 54. 1814.

Origin: Introduced from Europe

selected vouchers: WTU

Notes: FNA19: "The type of Hieracium flagellare may have resulted from a cross between plants of H. caespitosum and H. pilosella (A. Cronquist 1980)."

Although generally treated as a hybrid, this plant is often found in the absence of both of its parents, and is a widespread weed in eastern North America (Lepage 1967). Recently collected in San Juan County.


» Lepage, E. 1967. Étude de quelques hybrides chez nos épervières (Hieracium) adventices. Le Naturaliste Canadien 94: 609-619.
» Schischkin, B. K., and E. G. Bobrov, eds. 2002. Flora of the USSR. Volume XXX. Compositae Genus Hieracium. Translated from Russian. Smithsonian Institution Libraries, Washington, D.C. Contributor A. L. Juxip. Plates A. E. Likas. 706 p.
Synonyms & Misapplied Names:
Hieracium flagellare Willd. var. amauracron (Missback & Zahn) Lepage[KZ99]
Hieracium flagellare Willd. var. cernuiforme (Naegeli & Peter) Lepage[KZ99]
Hieracium ×flagellare Willd. var. flagellare[KZ99]
Hieracium flagellare Willd. var. pilosius Lepage[KZ99]