E-Flora BC: Electronic Atlas of the Flora of British Columbia

Gayophytum ramosissimum Torr. & A. Gray
hairstem groundsmoke (pinyon groundsmoke)
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants
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Distribution of Gayophytum ramosissimum
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Species Information

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Annual herb from a slender taproot; stems 15-40 cm tall, branched throughout, glabrous.
Linear, 1-3.5 cm long, 0.5-2.5 mm wide, entire, gradually but not significantly reduced above.
Inflorescence open, panicle-like, of several to many flowers on slender stalks in leaf axils, opening at dawn; sepals and petals about 0.5 mm long, the petals white to pinkish; largest stamens about 0.5 mm long; ovaries glabrous or minutely-hairy.
Capsules, 3-6 mm long, distinctly constricted between seeds; stalks threadlike, 3-6 mm long, often exceeding the capsules, spreading to erect in flower, but often sharply reflexed in fruit; seeds 10-30, in 2 rows in a chamber and overlapping, about 0.5 mm long, glabrous.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry slopes and forest openings in the steppe and lower montane zones; rare in S BC east of the Coast-Cascade Mountains; S to MT, CO, WY, UT, AZ and CA.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

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