Washington Flora Checklist
A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium
 

Checklist » Asteraceae » Helianthella uniflora var. douglasii

Helianthella uniflora (Nutt.) Torr. & A. Gray var. douglasii (Torr. & A. Gray) W.A. Weber [FNA20, H&C]
Asteraceae
Douglas helianthella, false sunflower

Origin: Native

Voucher:WTU (view specimen records)

Notes: FNA20: "Two infraspecific taxa within Helianthella uniflora may be distinguished; they have been named at varietal rank.

Variety douglasii has stems hirsute; involucres (15–)20–25(–30) mm diam.; outer phyllaries rarely elongated, margins ciliate, abaxial faces sparsely puberulent; ray laminae 30–40 mm; and 2n = 30. It grows in grasslands in the northern Rocky Mountains and on the east side of the Cascade Range (B.C.; Idaho, Oreg., Wash.) at 300–2500 m where it flowers May–Jul."

See Weber (1952)

Literature:
» Weber, W.A. 1952. The genus Helianthella (Compositae). American Midland Naturalist 48: 1-35.

Photo © Ben Legler
(from WTU Image Collection)

Taxon treatment authored by Peter F. Zika; last updated 11/19/2008 by David Giblin
Synonyms
(none)




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