Streptanthus glandulosus subsp. albidus
Novon 18: 280. 2008.
Stems 3–12 dm, sparsely hirsute proximally, glabrous distally. Cauline leaves: blade conduplicate distally, margins entire, surfaces glabrous. Racemes not secund; rachis straight. Fruiting pedicels 4–8 mm, glabrous. Flowers: sepals greenish white, white, or pale yellow, 7–11 mm, glabrous; petals white (with light brown or purplish veins), 11–17 mm; adaxial filaments 8–10 mm. Fruits divaricate to ascending, straight; valves glabrous. 2n = 28.
Phenology: Flowering Apr–Jul.
Habitat: Rocky, often barren ultramafic grassland openings
Elevation: 100-800 m
Of conservation concern.
Subspecies albidus is restricted to about ten populations at the western base of the Mount Hamilton Range, Santa Clara County. It intergrades locally with subsp. glandulosus in flower color.