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Published In: Smithsonian Contributions to Knowledge 5(6): 11. 1853. (Smithsonian Contr. Knowl.) Name publication detailView in Biodiversity Heritage Library

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

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10. Streptanthus carinatus C. Wright ex A. Gray, Pl. Wright. 2: 11. 1853.

     Herbs, annual or perhaps biennial, glabrous throughout, glaucous. Stems (2.1–)3–6.5(–7.5) dm, branched above base and/or upward. Basal leaves rosulate, pinnatifid, oblanceolate, 3.5–15(–30) cm, runcinate-pinnatifid, dentate, or entire; middle cauline leaves ovate to lanceolate, 2.5–14 x 0.4–5.5 cm, sessile, auriculate to amplexicaul; upper leaves similar, reduced. Racemes ebracteate, lax, without a terminal cluster of sterile flowers; fruiting pedicels divaricate-ascending, straight or curved upwards, 0.7–2.2(–3.5) cm. Flowers: sepals forming urceolate or campanulate calyx, deep purple or yellowish to nearly white, keeled, 8–11 mm; petals creamy white with purple veins or purple with white margins, recurved, 14–18 mm; blade 5–8 x 1–1.5 mm, crisped; claw 9–12 mm, about as wide as blade; filaments in 3 pairs of unequal length, free; adaxial pair exserted, 9–12 mm; abaxial pair 6–10 mm; lateral pair 4–7 mm; anthers of all stamens fertile, 4–5 mm. Fruits 3–8 cm x 4.5–6 mm, ascending, strongly flattened, straight, not torulose; valves glabrous, with obscure midvein; gynophore 0.5–2 mm; replum straight; style 0.5–2 mm; stigmas strongly 2-lobed; ovules and seeds 26–54 per fruit. Seeds orbicular, 3–5 mm diam.; wings continuous, 0.6–1.1 mm wide. 2n = 28.

Flowering: Feb–Apr.

Habitat: well-drained sandy or rocky soils, gravelly slopes, canyons, gravelly roadsides, desert scrub, sandy grasslands, cliff bases, talus, limestone, gravelly slopes, brushy areas, canyons and isolated in washes.

Elevation: 600–1700 m.

Distribution: Mexico (Baja California, Chihuahua, Coahuila), United Sates (Arizona, New Mexico, Texas).

     Two subspecies.



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                                   Key to the subspecies of Streptanthus carinatus

1. Sepals ochroleucous or yellowish; petals white with purplish veins; lowest leaves entire to

     runcinate-pinnatifid                             ............................................................................... 10a. subsp. arizonicus

1. Sepals purple; petals purple with white margin; lowest leaves runcinate-pinnatifid ................. 10b. subsp. carinatus



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