Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.

Hieracium piloselloides Vill.
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad P-Forb

Like H. aurantiacum, almost everywhere, especially along roadsides and in fields; railroads, gravel pits, and disturbed places of all kinds; invading dry forests, plantations, sandy and rocky openings, shores, even wet ground.

This is a European species, introduced a little more recently than H. aurantiacum and now about equally abundant in northern Michigan, where the two often dominate old fields and roadsides. The first Michigan collection is from Houghton Co. in 1914; it spread rapidly in the Copper Country. No collections from south of the Straits of Mackinac were noted before 1935 (Mackinaw City).

Our plants are quite variable and sometimes distinguished only with difficulty from H. caespitosum, which generally is a much hairier species on stems and leaves, with larger heads and darker, gland-tipped hairs among the dense stellate pubescence, especially on pedicels. Some plants referred to H. piloselloides have large heads on rather densely stellate pedicels, but with leaves and stems nearly glabrous. These and assorted other ambiguous plants (such as a very few hairy ones referred to H. caespitosum despite smaller heads than usual for that species) could result from hybridization.


Alger County
Alpena County
Antrim County
Baraga County
Benzie County
Berrien County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Crawford County
Delta County
Dickinson County
Emmet County
Gogebic County
Houghton County
Huron County
Iosco County
Iron County
Jackson County
Kalamazoo County
Kalkaska County
Keweenaw County
    Including Isle Royale
Lapeer County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Lenawee County
Livingston County
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Marquette County
Mecosta County
Menominee County
Monroe County
Montmorency County
Newaygo County
Oakland County
Ontonagon County
Oscoda County
Otsego County
Ottawa County
Presque Isle County
Saginaw County
Schoolcraft County
Van Buren County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 30, 2023.