Hieracium nudicaule

Hieracium nudicaule is a North American plant species in the dandelion tribe within the sunflower family. It grows only in the western United States, primarily in California and Oregon, though with a few populations in Washington and northern Idaho.[2][3]

Hieracium nudicaule
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Tribe: Cichorieae
Genus: Hieracium
Species:
H. nudicaule
Binomial name
Hieracium nudicaule
Synonyms[1]
  • Hieracium cynoglossoides var. nudicaule A.Gray 1883
  • Hieracium scouleri var. nudicaule (A.Gray) Cronquist

Hieracium nudicaule is an herb up to 50 cm (20 in) tall, with leaves on the stem and also in a rosette at the bottom. Leaves are up to 120 mm (4.7 in) long, sometimes with teeth on the edges. One stalk can produce 2-12 flower heads in a flat-topped array. Each head has 20-40 yellow ray flowers but no disc flowers.[4]

References
  1. The Plant List, Hieracium nudicaule (A.Gray) A. Heller
  2. Biota of North America Program 2004 county distribution map
  3. Calflora taxon report, University of California, Hieracium nudicaule (A. Gray) A. Heller, Naked stemmed scouler's hawkweed
  4. Flora of North America, Hieracium nudicaule (A. Gray) A. Heller, 1906.
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