Streptanthus glandulosus subsp. sonomensis

(Kruckeberg) M. S. Mayer & D. W. Taylor

Novon 18: 280. 2008.

Basionym: Streptanthus glandulosus var. sonomensis Kruckeberg Madroño 14: 223. 1958
Treatment appears in FNA Volume 7. Treatment on page 714. Mentioned on page 712.

Stems 2.3–7(–9) dm, moderately to densely hirsute proximally, glabrous distally. Cauline leaves: blade conduplicate distally, margins entire or denticulate, surfaces hirsute. Racemes secund; rachis straight. Fruiting pedicels 3–10 mm, sparsely pubescent or glabrous. Flowers: sepals cream or pale yellow, 5–6 mm, glabrous or sparsely pubescent; petals white (without purple veins), 10–17 mm; adaxial filaments 7–10 mm. Fruits spreading to slightly reflexed, arcuate; valves glabrous or sparsely pubescent. 2n = 28.

Phenology: Flowering May–Jul.
Habitat: Serpentine or Franciscan formation outcrops


Of conservation concern.

Subspecies sonomensis is known from Sonoma County.

Selected References


Lower Taxa

Ihsan A. Al-Shehbaz +
(Kruckeberg) M. S. Mayer & D. W. Taylor +
Streptanthus glandulosus var. sonomensis +
Serpentine or Franciscan formation outcrops +
Flowering May–Jul. +
Erysimum glandulosum +  and Euklisia glandulosa +
Streptanthus glandulosus subsp. sonomensis +
Streptanthus glandulosus +
subspecies +