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Hieracium flagellare Willd.
Common Name: WHIP-LASH HAWKWEED
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad P-Forb

Hieracium flagellare A. A. Reznicek

An introduction from Europe. Old fields, roads, railroads, and other disturbed sites; lawns and edges of forests. First collected in Michigan in 1969 (Sanilac Co.) and 1971 (Ingham Co.).

Averaging only slightly taller than H. pilosella and also strongly stoloniferous. Few-headed plants of H. caespitosum might be thought to belong here, but that species has shorter involucres and the leaves are both more acute at the apex and more tapered at the base than in H. flagellare. Intermediate plants with ± numerous stellate hairs on the leaves beneath may represent hybrids between these two species.

This species itself is suspected to be of hybrid origin, between Hieracium caespitosum and H. pilosella. It appears to be significantly more frequent in Michigan than H. pilosella.

Locations

Berrien County
Calhoun County
Ingham County
Leelanau County
Lenawee County
Livingston County
Macomb County
Monroe County
Newaygo County
Sanilac County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 30, 2023. https://michiganflora.net/species.aspx?id=365.