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Published In: Madroño 30(4): 230–235, 244, f. 1, 2b. 1983. (Madroño) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/24/2009)

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14. Streptanthus drepanoides Kruckeberg & J. L. Morrison, Madroño 30: 230. 1983. TYPE: United States, California, Tehama Co., serpentine outcrops on the Paskenta-Covelo road, 8-10 mi. [12.8 km] from Paskenta, 500-600 m, 21 May 1940, John L. Morrison & Charles M. Belshaw 3215 (holotype, UC!).

     Herbs, annual, glabrous except sometimes for sepals, glaucous. Stems 0.4–3.5(–4.5) dm, erect, simple or divaricately branched about base. Basal leaves not rosulate, subsessile or short petiolate, orbicular, soon withering, with few blunt teeth; middle cauline orbicular or orbicular-ovate, 1.3–9 x 1–7.5 cm, strongly overlapping, succulent, sessile, auriculate-cordate at base, entire to shallowly dentate; upper leaves similar, reduced. Racemes ebracteate, dense, without a terminal cluster of sterile flowers; fruiting pedicels divaricate-ascending, straight, 1.5–4 mm. Flowers: sepals forming urceolate calyx, greenish yellow, ovate, 5–7 mm, keeled, reflexed at apex, glabrous or pilose; petals ochroleucous, with brownish purple veins, recurved at apex, 7–10 mm; blade 2–3 x 1–1.5 mm, crisped; claw 5–7 mm, wider than blade; filaments in 3 pairs of unequal length; adaxial pair united to apex, 8–10 mm; abaxial pair united to middle, 5–6 mm; lateral pair 3–4 mm; anthers of adaxial stamens sterile, 0.7–1 mm; anthers of abaxial and lateral stamens fertile, 1.8–2.5 mm. Fruits 3–9 cm x 1–1.2 mm, divaricate-ascending, slightly flattened, strongly falcate, not or rarely slightly torulose; valves glabrous, with obscure midvein; gynophore 0.5–1 mm; replum straight; style 0.5–1 mm; stigma entire; ovules and seeds 30–50 per fruit. Seeds oblong, 1–1.5 x 0.7–1 mm; wing absent or distal and to 0.1 mm wide. 2n = 28.

Flowering: May–Jul.

Habitat: steep mobile substrate on sedimentary or volcanic slopes, principally on serpentine outcrops and openings in chaparral, pine woodlands.

Elevation: 250–1800 m.

Distribution: United States (California).




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