Common Names: Oneflower, Oneflower Helianthella, Little Sunflower
Synonyms:
Taxonomy: Sunflower (Asteraceae)
Habit: perennial herb
Size: up to 4’
Flowers: Yellow
Bloom: May, Jun, Jul, Aug
Leaves: opposite below, alternate above
Fruit: cypsela
Description:
Helianthella uniflora is a herbaceous plant up to 4’ (120 cm) tall. Leaves are up to 10” (25 cm) long, each with 3 prominent veins running the length of the leaf. It is a taprooted perennial herb producing erect stems up to about 60 centimeters tall. The many lance-shaped leaves are up to 1.5” wide and smooth or slightly toothed along the edges. The plant usually produces only one yellow flower head per stem, though sometimes 2 or 3, the heads not nodding (hanging). Each head contains 11-21 bright yellow ray flowers surrounding numerous yellow disc flowers.
Distribution: CO, ID, MT, NM, NV, OR, UT, WA, WY
Habitat: Adapted to coarse shallow soils in shrub and woodland communities; 2,000 to 10,500 ft. elevation
