Hazardia whitneyi

Hazardia whitneyi, common name Whitney's bristleweed,[3] is a North American species of shrub in the daisy family. It has been found only in the states of Oregon and California in the western United States.[4][5]

Hazardia whitneyi
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Hazardia
Species:
H. whitneyi
Binomial name
Hazardia whitneyi
(A.Gray) Greene 1896
Synonyms[1][2]
  • Haplopappus whitneyi A. Gray 1868
  • Aplopappus whitneyi A. Gray 1868
  • Aster whitneyi (A.Gray) Kuntze

Hazardia whitneyi is a perennial herb or subshrub up to 50 cm (20 in) tall. The plant produces numerous flower heads in a dense, elongated array at the top of the plant. Each head contains 8-10 disc flowers but no ray flowers. The species sometimes grows on serpentine soils.[6]

Varieties[2][6]
  • Hazardia whitneyi var. discoidea (J.T.Howell) W.D.Clark - no ray flowers - California, Oregon in Klamath Mountains, southern Cascades, and north Coast Ranges
  • Hazardia whitneyi var. whitneyi - 5-18 ray flowers per head - California, primarily in Sierra Nevada

References
  1. Tropicos, Haplopappus whitneyi A. Gray
  2. The Plant List, Hazardia whitneyi (A.Gray) Greene
  3. "Hazardia whitneyi". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 20 July 2015.
  4. Calflora taxon report, University of California, Hazardia whitneyi (A. Gray) E. Greene, Whitney's bristleweed
  5. Biota of North America Program 2014 county distribution map
  6. Flora of North America, Hazardia whitneyi (A. Gray) Greene, 1896. Whitney’s bristleweed


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