22a. Lepidium lasiocarpum Nuttall subsp. lasiocarpum
Lepidium georginum Rydberg; L. lasiocarpum subsp. georginum (Rydberg) Thellung; L. lasiocarpum var. georginum (Rydberg) C. L. Hitchcock; L. lasiocarpum var. rosulatum C. L. Hitchcock
Fruiting pedicels 0.2-0.4(-0.6) mm wide, usually less than 3 times as wide as thick. Nectar glands toothlike, 0.1-0.2 mm. Fruit valves hirsute or minutely fringed on margin, trichomes not pustular-based. 2n = 32.
Flowering Mar-Jun. Pinyon-juniper woodlands, sagebrush and other shrub communities, open deserts, dry washes and flats, waste places, streambeds, roadsides, sandy areas, rock slides, stony slopes; -50-2700 m; Ariz., Calif., Colo., Nev., N.Mex., Tex., Utah; Mexico (Baja California, Coahuila, Nuevo León, San Luis Potosí, Sinaloa, Sonora).
In subsp. lasiocarpum there is considerable variation in the density and location of trichomes on the fruit valve; in some populations (e.g., Rollins & Munz 6741, GH), the trichomes are present over the entire valve; in others they are restricted as a fringe along part of the fruit margin.