Hieracium scouleri

Hieracium scouleri
At the base of the plant is a rosette of hairy leaves (Dark Divide).
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Tribe: Cichorieae
Genus: Hieracium
Species: H. scouleri
Binomial name
Hieracium scouleri
Hook. 1833
Synonyms[1]

Hieracium scouleri is a North American species of hawkweed in the dandelion tribe within the sunflower family. It is known by the common name Scouler's woollyweed. It is native to the United States and Canada from British Columbia and Alberta south as far as northern California and Utah.[2][3][4]

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 ray florets. The achene is about 3 millimetres (0.12 in) long.[5]

Flower heads have protruding disc florets and bright yellow ray florets (Mount Rainier National Park).


References

  1. ↑ The Plant List, Hieracium scouleri Hook.
  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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