Gayophytum diffusum var. strictipes (Hooker) Dorn; G. lasiospermum Greene; G. lasiospermum var. hoffmannii Munz; G. nuttallii Torrey &A. Gray var. abramsii Munz; G. nuttallii var. intermedium (Rydberg) Munz; G. ramosissimum Torrey & A. Gray var. strictipes Hooker

Flowers: sepals 0.9–2 mm; petals 1.2–3 mm; stigma subglobose, surrounded by anthers at anthesis. 2n = 28.

Flowering Jun–Oct. Open pine forests, sagebrush slopes, dry margins of meadows; 800–3700 m; B.C.; Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., S.Dak., Utah, Wash., Wyo.; Mexico (Baja California).

Subspecies parviflorum is extremely variable and may sometimes closely resemble diploid species Gayophytum decipiens, G. heterozygum, G. oligospermum, and G. ramosissimum, the first of which are hypothesized to have been involved in its origin and variation (H. Lewis and J. Szweykowski 1964).