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Published In: Proceedings of the American Academy of Arts and Sciences 17: 364. 1882. (Proc. Amer. Acad. Arts) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/23/2009)

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1. Caulanthus amplexicaulis S. Watson, Proc. Amer. Acad. Arts 17: 364. 1882; Euclisia amplexicaulis (S. Watson) Greene, Leafl. Bot. Observ. Crit. 1: 84. 1904; Streptanthus amplexicaulis (S. Watson) Jepson, Man. Fl. Pl. Calif. 417. 1925. TYPE: United States, California, San Bernardino Mountains, May 1881, S. B. Parish and W. F. Parish 846 (holotype, GH!; isotype, MO!).

Pleiocardia magna Greene, Leafl. Bot. Observ. Crit. 1: 87. 1904. TYPE: United States, California, San Bernardino Mountains, 1889, 4900 ft, W. G. Wright s.n. (holotype, NDG).

Streptanthus amplexicaulis var. barbarae J. T. Howell, Leafl. W. Bot. 9: 223. 1962; Caulanthus amplexicaulis var. barbarae (J. T. Howell) Munz, Suppl. Calif. Fl. 23. 1968. TYPE: United States, California, Santa Barbara Co., 0.7 miles W of Cachuma Saddle on road to Ranger Peak,  rocky crevices on 50 ft serpentine cliff, 21 May 1961, D. Breedlove 466 (holotype, CAS!; isotypes, CAS!, DS!, GH!, NY!, SBS, SBG, US!).

     Herbs, annual, glabrous throughout, glaucous. Stems 0.4–11 dm, erect, simple or branched above. Basal leaves rosulate; petiole 0.5–3 cm; blade obovate to broadly oblanceolate, 1–7 x 0.5–3.7 cm, margin coarsely dentate; middle cauline leaves sessile, oblong to broadly ovate or obovate, 2–8 x 1–4 cm, gradually reduced in size upwards, base amplexicaul, margin coarsely dentate or entire. Racemes without a terminal cluster of sterile flowers, ebracteate, lax, elongated in fruit; fruiting pedicels divaricate to ascending, 2.5–19 mm. Sepals dark maroon purple or ochroleucous to yellowish, ovate to ovate-lanceolate, 4–9.2 ´ 2–4 mm, erect, equal, not keeled; petals with purple and slightly longer adaxial pair and stramineous to yellowish green or rarely pale purple abaxial pair, 10–18 mm; blade 4-10 x 0.5–1.5 mm, crisped; claw narrowly oblong-oblanceolate, 6–10 x 1–3 mm; filaments in 3 unequal pairs, free, adaxial pair 4.5–9 mm, abaxial pair 3–7 mm, lateral pair 1–5 mm; anthers oblong, 1–3.5 mm, adaxial pair shorter than median or lateral pairs; ovules 40–92 per ovary. Fruits 4.5–14(–16.7) cm ´ 1–1.5 mm, divaricate to ascending, terete or slightly latiseptate, often distinctly curved; valves with an obscure midvein; style obsolete or to 0.4 mm; stigma subentire. Seeds 1.4–2.2 x 0.9–1.2 mm; cotyledons entire.

Flowering Apr–Jul(–Aug).

Habitat: chaparral, montane forests, serpentine areas, grantitic and shale scree.

Elevation: 800–2900 m.

Distribution: United States (S California).


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