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Streptanthus brachiatus F.W. Hoffman Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Madroño 11(6): 230, 232–233, f. 5. 1952. (Madroño) Name publication detail
 

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

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5. Streptanthus brachiatus F. W. Hoffman, Madroño 11: 230. 1952. TYPE: United Sates, California, Sonoma Co., serpentine ridge near Contact Mine, E of Pine Flat, 300 ft, 5 Jun 1949, A.rthur R. Kruckeberg & Freed W. Hoffman 2905 (holotype, UC!; isotypes, 2GH!, MO!, NY!, UC!).

Streptanthus brachiatus subsp. hoffmanii R. Dolan & LaPré, Madroño 36: 36. 1989. TYPE: United States, California, Lake Co., near Sonoma Co. line on Bear Ridge rd, ¼ mi. S of three-way jct. with Ridge Rd and Davies Rd, 2 May 1985, Lawrence LaPré s.n. (holotype, UC!; isotypes, CAS!, RSA!, UC!).

     Herbs, biennial, glabrous throughout, somewhat glaucous. Stems 1.4–5(–6) dm, branched about base or rarely simple. Basal leaves rosulate, soon withered, shortly petiolate, broadly obovate to suborbicular, 1.5–4 cm, coarsely dentate, fleshy, mottled; middle cauline leaves ovate to cordate, 0.7–3.7 x 0.3–1.5 cm, sessile, auriculate to amplexicaul, serrate-dentate to entire; upper leaves similar, reduced. Racemes ebracteate, sometimes secund, lax, without a terminal cluster of sterile flowers; fruiting pedicels divaricate-ascending, straight, 1–2 mm. Flowers: sepals forming urceolate calyx, rose-purple to yellowish at base, ovate, 5–7 mm, keeled, erect, apex recurved; petals whitish, 7–10 mm, adaxial pair faintly purple-veined, abaxial pair with a purple spot; blade 1.5–3 x 1–1.5 mm, not crisped; claw 5–7 mm, as wide as or wider than blade; staminal filaments in 3 pairs of unequal length; adaxial pair completely united, usually recurved, 8–10 mm; abaxial pair united below middle, 4–7 mm; lateral pair 2–4 mm; anthers of adaxial stamens sterile, 0.7–1.2 mm; anthers of abaxial and lateral stamens fertile, 2–2.5 mm. Fruits 4–6 cm x 1–1.3 mm, divaricate-ascending, flattened, nearly straight, torulose; valves glabrous, with obscure midvein; gynophore 0.3–0.7 mm; replum constricted between seeds; style 0.1–0.4 mm; stigma subentire; ovules and seeds 22–30 per fruit. Seeds oblong, 1.8–2.5 x 0.7–0.9 mm; wing distal, ca. 0.1 mm wide, or absent. 2n = 28.

Flowering: Jun–Jul.

Habitat: serpentine barrens in chaparral, pine-oak or cypress woodland openings.

Elevation: 600–950 m.

Distribution: United States (California/Lake and Sonoma counties).

 
 


 

 
 
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