[dev.semanticfna.org] Description, Range, Habitat: family Brassicaceae
tribe Brassicaceae tribe Thelypodieae
species Streptanthus vimineus
Annuals; (glaucous), usually glabrous throughout (sometimes sepals pubescent). Stems branched distal to base, 1 to 7.5 dm. Basal leaves (soon withered); not rosulate; petiolate; blade narrowly ovate to oblong, 2.5 to 5 cm, margins entire. Cauline leaves: blade linear to narrowly linear-lanceolate, 2 to 1 2 cm × 1 to 3 mm, (smaller distally), base auriculate, margins entire. Racemes ebracteate, (lax, usually secund). Fruiting pedicels divaricate, (straight), 1 to 3 mm. Flowers: calyx urceolate; sepals greenish to purplish, ovatelanceolate, 6 to 8 mm, keeled, (apex recurved, usually glabrous, rarely sparsely pubescent); petals white (abaxial pair with purple veins), 8 to 12 mm, blade 3 to 5 × 2 to 3 mm, (unequal, abaxial longer than adaxial), margins not crisped, claw 5 to 7 mm, narrower than blade; stamens in 3 unequal pairs; filaments: abaxial pair (connate 1/2 their length), 4 to 7 mm, lateral pair 2 to 4 mm, adaxial pair (connate their whole length, recurved), 7 to 11 mm; anthers: abaxial and lateral pairs fertile, 2 to 2.7 mm, adaxial pairs sterile, 0.5 to 1.2 mm; gynophore 0.2 to 0.5 mm. Fruits divaricate, slightly torulose, recurved, flattened, 3.5 to 6.5 cm × 1 to 1.2 mm; valves each with obscure midvein; replum straight; ovules 28 to 40 per ovary; style 0.1 to 0.3 mm; stigma entire. Seeds narrowly oblong, 1 to 1.5 × 0.6 to 0.8 mm; wing 0 to 0.1 mm wide, distal.
Phenology: Flowering May to Jul.
Habitat: Serpentine grasslands, ridges and barrens, openings in chaparral
Elevation: 200 to 800 m (contributed by Mary Ann Machi)
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