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17e. Streptanthus glandulosus Hooker subsp. niger (Greene) Al-Shehbaz, M. S. Mayer & D. W. Taylor, Novon. 18: 280. 2008.
Streptanthus niger Greene, Bull. Torrey Bot. Club 13: 141. 1886; Euklisia nigra (Greene) Greene; S. glandulosus var. niger (Greene) Munz
Stems 2-11 dm, glabrous throughout. Cauline leaves: blade conduplicate distally, margins entire, surfaces glabrous. Racemes not secund; rachis flexuous. Fruiting pedicels 10-32 mm, glabrous. Flowers: sepals dark purple-black, 7-8 mm, glabrous; petals dark purple, 10-12 mm; adaxial filaments 8-10 mm. Fruits divaricate-ascending, straight; valves glabrous. 2n = 28.
Flowering May-Jul. Serpentine grasslands; of conservation concern; Calif.
Subspecies niger is known from the Tiburon Peninsula, Marin County.
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