Stems 1.5-4.5(-7) dm, densely hirsute proximally, sparsely to moderately so distally. Cauline leaves: blade flat distally, margins entire or denticulate, surfaces moderately to sparsely hirsute. Racemes secund; rachis straight. Fruiting pedicels 5-15 mm, sparsely pubescent or glabrous. Flowers: sepals lavender or rose to purple, 6-7 mm, sparsely pubescent or glabrous; petals lavender to purplish, 10-12 mm; adaxial filaments 7-10 mm. Fruits spreading to reflexed, arcuate; valves sparsely pubescent or glabrous. 2n = 28 .

Flowering May-Jul. Serpentine or Franciscan formation outcrops; of conservation concern; Calif.

Subspecies hoffmanii is known from Sonoma County.