Hieracium longiberbe

Hieracium longiberbe, known by the common name longbeard hawkweed,[1] is a rare North American plant species in the dandelion tribe within the sunflower family. It has been found only in the Columbia River Gorge along the border between the states of Washington and Oregon in the northwestern United States.[2][3]

Hieracium longiberbe
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Tribe: Cichorieae
Genus: Hieracium
Species:
H. longiberbe
Binomial name
Hieracium longiberbe
Howell 1901

Hieracium longiberbe is an herb up to 50 cm (20 in) tall, with leaves mostly on the stem rather than in a rosette at the bottom. Leaves, stems, and the bracts surrounding the flower heads are covered with long and conspicuous hairs up to 8 mm (0.31 in) long. Leaves are up to 100 mm (3.9 in) long, with no teeth on the edges. One stalk will produce 3-12 flower heads in a flat-topped array. Each head has 12-24 yellow ray flowers but no disc flowers.[4]

References
  1. "Hieracium longiberbe". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 23 July 2015.
  2. Biota of North America Program 2004 county distribution map
  3. Washington Flora Checklist, University of Washington Herbarium
  4. Flora of North America, Hieracium longiberbe Howell, 1901.


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