Hieracium scouleri

Hieracium scouleri, known as Scouler's woollyweed, is a species of flowering plant in the tribe Cichorieae within the family Asteraceae. It is native to western North America, from British Columbia and Alberta in Canada, and south to northern California and Utah in the United States.[2][3][4]

Hieracium scouleri
At the Dark Divide, Washington
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Hieracium
Species:
H. scouleri
Binomial name
Hieracium scouleri
Hook.[1]
Synonyms[1]
List
  • Pilosella scouleri (Hook.) F.W.Schultz & Sch.Bip.
  • Hieracium absonum J.F.Macbr. & Payson
  • Hieracium albertinum Farr
  • Hieracium chapacanum Zahn
  • Hieracium cusikii Gand.
  • Hieracium cynoglossoides Arv.-Touv.
  • Hieracium flettii H.St.John
  • Hieracium praealtum var. decipiens W.D.J.Koch
  • Hieracium scouleri Hook. ex A.Gray

Description

Hieracium scouleri grows in a variety of mountainous habitats. It produces a basal rosette of long, narrow leaves 10–20 centimetres (3.9–7.9 in) long, which are generally hairy to bristly. The plant produces an erect stem 30–70 centimetres (12–28 in) tall which bears the inflorescence. Each flower head has large, curling bracts with glandular hairs or bristles, long, bright yellow ray florets but no disc florets. The achene is about 3 millimetres (0.12 in) long.[5]

  • Flower heads have many bright yellow ray florets
    Flower heads have many bright yellow ray florets

References
  1. "Hieracium scouleri Hook.". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2022-08-31.
  2. Biota of North America Program 2014 county distribution map
  3. Calflora taxon report, University of California, Hieracium scouleri Hook., Hounds tongue hawkweed, Houndstongue hawkweed, Scouler's hawkweed, Scouler's woollyweed
  4. Turner Photographics, Hieracium scouleri - Wildflowers of the Pacific Northwest photos, description, partial distribution map
  5. Flora of North America, Hieracium scouleri Hooker, 1833.


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