Caulanthus amplexicaulis |
Caulanthus glaucus |
|
---|---|---|
clasping leaf caulanthus, claspingleaf wild cabbage |
glaucous caulanthus, glaucous wild cabbage |
|
Habit | Annuals; glabrous throughout. | Perennials; glabrous throughout. |
Stems | erect, unbranched or branched distally, 0.4–11 dm. |
erect or ascending, unbranched or branched distally, 3–12 dm. |
Basal leaves | rosulate; petiole 0.5–3 cm; blade obovate to broadly oblanceolate, 1–7 cm × 5–37 mm, margins coarsely dentate. |
not rosulate; petiole 1–8 cm; blade broadly obovate or oblong to elliptic, 2–10 cm × 20–120 mm, margins usually entire, rarely coarsely dentate-sinuate. |
Cauline leaves | (median) sessile; blade oblong to broadly ovate or obovate, 2–8 cm × 10–40 mm (smaller distally, base amplexicaul), margins coarsely dentate or entire. |
(distalmost) shortly petiolate; blade lanceolate to linear, 1–3.5 cm × 3–10 mm, margins entire. |
Racemes | (lax), without a terminal cluster of sterile flowers. |
(densely flowered), without a terminal cluster of sterile flowers. |
Flowers | sepals erect, (dark maroon-purple or ochroleucous to yellowish), ovate to ovate-lanceolate, 4–9.2 × 2–4 mm (equal); petals (abaxial pair) usually stramineous to yellowish green, rarely pale purple, (adaxial pair) purple, (slightly longer), 10–18 mm, blade 4–10 × 0.5–1.5mm, crisped, claw narrowly oblong-oblanceolate, 6–10 × 1–3 mm; filaments in 3 unequal pairs, abaxial pair 3–7 mm, lateral pair 1–5 mm, adaxial pair 4.5–9 mm; anthers oblong, unequal, 1–3.5 mm (adaxial pair smaller). |
sepals erect, (purplish or green to yellowish green), lanceolate, 7–12 × 2–3 mm (equal); petals purple or yellowish green, (not or faintly veined),11–17.5 mm, blade 3–6 × 1.8–2.7 mm, not crisped, claw narrowly oblong to narrowly oblanceolate, 8–12 × 3–4 mm; filaments tetradynamous, median pairs 3.5–8 mm, lateral pair 2–7 mm; anthers narrowly oblong, equal, 3.5–4.5 mm. |
Fruiting pedicels | divaricate to ascending, 2.5–19 mm. |
ascending, 5–35 mm. |
Fruits | divaricate to ascending (often distinctly curved), terete or slightly latiseptate, 4.5–14(–16.7) cm × 1–1.5 mm; valves each with obscure midvein; ovules 40–92 per ovary; style 0–0.4 mm; stigma subentire. |
divaricate to ascending (often distinctly curved), terete, 4.5–15.5 cm × 1–1.6 mm; valves obscurely veined; ovules 180–210 per ovary; style 0.2–1 mm; stigma strongly 2-lobed (lobes 0.9–1.5 mm, connivent, opposite replum). |
Seeds | 1.4–2.2 × 0.9–1.2 mm. |
1–2 × 0.8–1.2 mm. |
2n | = 28. |
= 20. |
Caulanthus amplexicaulis |
Caulanthus glaucus |
|
Phenology | Flowering Apr–Jul(-Aug). | Flowering Apr–Jun. |
Habitat | Chaparral, montane forests, serpentine areas, granitic and shale scree | Sagebrush scrub, dry slopes and rocky outcrops |
Elevation | 800-2900 m (2600-9500 ft) | 1500-2400 m (4900-7900 ft) |
Distribution |
CA
|
CA; NV |
Discussion | Caulanthus amplexicaulis is known from Los Angeles, San Bernardino, Santa Barbara, and Ventura counties. The serpentine populations of Santa Barbara County have sepals that are ochroleucous to yellowish instead of the dark maroon ones found elsewhere in the species range. They were recognized by R. C. Rollins (1993) and R. E. Buck (1995) as var. barbarae. Both vars. barbarae and amplexicaulis form a distinct monophyletic clade but they are without reproductive barriers (A. E. Pepper and L. E. Norwood 2001). Some other species of Caulanthus show comparable or even greater variation in sepal color, and it might be more practical to treat var. barbarae as a color form. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Caulanthus glaucus is known in California from Inyo and Mono counties and in Nevada from Esmeralda, Mineral, and Nye counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 679. | FNA vol. 7, p. 682. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Caulanthus | Brassicaceae > tribe Thelypodieae > Caulanthus |
Sibling taxa | ||
Synonyms | C. amplexicaulis var. barbarae, Euklisia amplexicaulis, Pleiocardia magna, Streptanthus amplexicaulis, Streptanthus amplexicaulis var. barbarae | Streptanthus glaucus |
Name authority | S. Watson: Proc. Amer. Acad. Arts 17: 364. (1882) | S. Watson: Proc. Amer. Acad. Arts 17: 364. (1882) |
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