''Hazardia whitneyi'', common name Whitney's bristleweed, is a North American species of

shrub A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...

in the

daisy family The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. It has been found only in the states of

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

and

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

in the western United States.Biota of North America Program 2014 county distribution map
/ref> ''Hazardia whitneyi'' is a perennial herb or subshrub up to 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.Flora of North America, ''Hazardia whitneyi'' (A. Gray) Greene, 1896. Whitney’s bristleweed
/ref> ;Varieties *''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

External links

Photo of herbarium specimen at Missouri Botanical Garden, collected in California in 1866, isotype of ''Hazardia whitneyi/Aplopappus whitneyi''
Flora of Oregon Flora of California whitneyi Plants described in 1868 Flora without expected TNC conservation status {{Astereae-stub