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Hieracium caespitosum Dumort.

Common Name: KING DEVIL, YELLOW HAWKWEED
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad P-Forb

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.

B. S. Walters

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Counties
Alger
Allegan
Barry
Berrien
Calhoun
Cheboygan
Clare
Crawford
Genesee
Grand Traverse
Hillsdale
Ionia
Iosco
Isabella
Jackson
Kalamazoo
Kent
Keweenaw
Lake
Lapeer
Leelanau
Lenawee
Livingston
Macomb
Manistee
Mason
Mecosta
Midland
Monroe
Muskegon
Newaygo
Oakland
Oceana
Ottawa
Sanilac
St. Clair
Washtenaw
Wayne

Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March, 17, 2025
https://lsa-miflora-p.lsait.lsa.umich.edu/#/record/364