Caulanthus lemmonii |
Caulanthus barnebyi |
|
---|---|---|
Lemmon's jewelflower, Lemmon's wild cabbage |
Black Rock wild cabbage |
|
Habit | Annuals; hispid basally, subglabrate or glabrous distally. | Perennials; glabrous throughout. |
Stems | erect or ascending, usually branched distally, 1–8 dm, sparsely hispid basally. |
erect or ascending, unbranched or branched distally, 5–11 dm. |
Basal leaves | rosulate; petiole 0.3–3 cm; blade oblanceolate, 0.7–9 cm × 4–25 mm, margins coarsely dentate-sinuate. |
not rosulate; petiole 1.5–3.8 cm; blade broadly obovate to broadly ovate or oblong, 3.5–15.5 cm × 22–100 mm, margins entire or coarsely dentate-sinuate. |
Cauline leaves | (median) sessile; blade lanceolate to narrowly ovate, 0.5–11 cm × 2–45 mm, (smaller distally, base amplexicaul), margins entire or denticulate. |
|
Racemes | (densely flowered), with a terminal cluster of sterile flowers. |
(densely flowered), without a terminal cluster of sterile flowers. |
Flowers | sepals erect to ascending, (dark purple in bud, becoming greenish or creamy white and purplish or brown distally), ovate to narrowly lanceolate, 6–17 × 2.5–3.5 mm (subequal, keeled, usually glabrous, rarely pubescent, trichomes simple); petals white (with dark purple veins), 8–20 mm, blade 4–8 × 1.5–2 mm, crisped, claw oblanceolate, 4–11 × 2–3 mm; filaments in 3 unequal pairs, (median pairs often connate), abaxial pair 3.5–11mm, lateral pair 2–7 mm, adaxial pair 5–12 mm; anthers oblong to linear-oblong, unequal, 1.5–4 mm, (adaxial pair smaller). |
sepals erect (purplish or sometimes green), ovate-oblong to lanceolate, 7.5–11 × 2.5–3 mm (equal); petals creamy white (with prominent purple or brown veins),12.5–18.5 mm, blade 6–8 × 2–2.5 mm, not or slightly crisped, claw oblanceolate, 5–9 × 1.2–2 mm; filaments tetradynamous, median pairs 3–5 mm, lateral pair 2.5–4.5 mm; anthers narrowly oblong, equal, 3–4.5 mm. |
Fruiting pedicels | ascending to divaricate, 3–18(–27) mm, pubescent or glabrous. |
ascending, 5–17 mm. |
Fruits | erect or ascending (often straight), terete or slightly latiseptate, 5–12 cm × 2.5–3.5 mm; valves each with prominent midvein basally; ovules 52–72 per ovary; style 0–4 mm; stigma strongly 2-lobed (lobes 1–4 mm, opposite valves). |
divaricate to ascending (often distinctly curved), terete, 5.7–12.5 cm × 1.7–2.3 mm; valves each with obscure midvein; ovules 76–90 per ovary; style usually obsolete, rarely to 2.5 mm; stigma strongly 2-lobed (lobes to 0.4 mm, connivent, opposite replum). |
Seeds | 2–3.5 × 1.7–2.2 mm. |
1.4–2.1 × 0.8–1.2 mm. |
Cau | -line leaves (distalmost) shortly petiolate to subsessile; blade linear to lanceolate or oblanceolate, margins entire. |
|
2n | = 28. |
= 20. |
Caulanthus lemmonii |
Caulanthus barnebyi |
|
Phenology | Flowering (Feb-)Mar–May. | Flowering May–Jun. |
Habitat | Grassland, chaparral, scrub | Dry, steep slopes, rocky outcrops, on slate, metamorphic, or igneous substrates |
Elevation | 100-1100 m (300-3600 ft) | 1300-1500 m (4300-4900 ft) |
Distribution |
CA
|
NV |
Discussion | Of conservation concern. Both R. C. Rollins (1993) and R. E. Buck (1995) treated Caulanthus lemmonii as a variety of C. coulteri, whereas E. B. Payson (1923) treated the two as independent species. The differences between them clearly justify their separate recognition. In fact, those differences are far greater than those that distinguish the minor color form “barbarae” that both Rollins and Buck recognized as a distinct variety of C. amplexicaulis. The types of both C. coulteri and C. lemmonii are quite distinct. The slight intergradation between the two taxa, especially in occurrence of branched trichomes and lobing of cotyledons, most likely resulted from hybridization, but that needs to be verified experimentally and molecularly. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Caulanthus barnebyi is known from Humboldt and Pershing counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 684. | FNA vol. 7, p. 679. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Caulanthus | Brassicaceae > tribe Thelypodieae > Caulanthus |
Sibling taxa | ||
Synonyms | C. coulteri var. lemmonii, Streptanthus coulteri var. lemmonii, Streptanthus parryi | |
Name authority | S. Watson: Proc. Amer. Acad. Arts 23: 261. (1888) | Rollins & P. K. Holmgren: Brittonia 32: 148, fig. 1. (1980) |
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