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

Hieracium caespitosum B. S. Walters

Roadsides, fields, clearings, disturbed sites; dry open forests, meadows, banks; a less common immigrant than H. aurantiacum and H. piloselloides. First collected in Michigan in 1936 (Cheboygan Co.), and spreading most rapidly since the 1960’s.

The ± glaucous nature of leaves of H. piloselloides is often not evident on dried specimens, making separation from H. caespitosum more difficult. The conspicuous long, often stiff hairs on leaves and stem, often larger leaves, and darker inflorescence of larger heads give H. caespitosum a reasonably distinct aspect hard to express in a key and open to exception on any one character. The leaves are often sparsely stellate-pubescent beneath (in addition to long hairs), but are more acute at the apex than the ± obtuse to rounded ones of H. flagellare.

 A few collections from Allegan, Berrien, Calhoun, Kalamazoo, Lenawee, Luce, Newaygo, and Oceana Cos. appear intermediate between this species and H. flagellare; one from Iosco Co. appears intermediate with H. aurantiacum.


Alger County
Allegan County
Barry County
Berrien County
Calhoun County
Cheboygan County
Clare County
Crawford County
Genesee County
Grand Traverse County
Hillsdale County
Ionia County
Iosco County
Isabella County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
    Only on Isle Royale
Lake County
Lapeer County
Leelanau County
    Including Fox Islands
Lenawee County
Livingston County
Macomb County
Manistee County
Mason County
Mecosta County
Midland County
Monroe County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ottawa County
Sanilac County
St. Clair 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.