Streptanthus bernardinus |
Streptanthus batrachopus |
|
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Laguna Mountain jewelflower, Laguna Mountains. jewel flower |
Mt. Tamalpais jewelflower, Tamalpais jewel flower |
|
Habit | Perennials; (caudex woody, often elevated); (glaucous), glabrous, (petioles and sepal apices pubescent). | Annuals; (glaucous), glabrous throughout. |
Stems | unbranched or branched (few), 2.5–8.6 dm. |
unbranched or branched basally, 0.3–1.7(–2.8) dm. |
Basal leaves | not rosulate; petiolate (petioles ciliate); blade oblanceolate to spatulate, 2–8 cm (7–-25 mm wide), margins remotely dentate apically. |
(soon withered); not rosulate; shortly petiolate; blade (succulent, mottled), obovate to oblanceolate, 0.5–2 cm, margins coarsely dentate. |
Cauline leaves | blade ovate to lanceolate, 2–10 cm × 5–28 mm (smaller distally), base amplexicaul, margins entire, (apex acute to acuminate). |
blade lanceolate, 0.5–2.5 cm × 1–7 mm (smaller distally), base auriculate, margins entire or dentate (entire distally). |
Racemes | ebracteate, (lax in bud). |
ebracteate (lax, sometimes secund). |
Flowers | calyx campanulate; sepals (ascending), pale yellow to white, (broadly oblong to ovate) 5–9 mm, not keeled; petals white, 7–11 mm, blade 2–4 × 1–1.3 mm, margins not crisped, claw 6–9 mm, wider than blade; stamens nearly tetradynamous; filaments: median pairs (distinct), 6.5–8.5 mm, lateral pair 4.5–5.5 mm; anthers (all) fertile, 3.5–4.5 mm; gynophore 0.5–1.5 mm. |
calyx urceolate; sepals (erect) reddish purple, (ovate), 3–5 mm, keeled, (apex spreading); petals whitish (abaxial pair with purplish veins, adaxial pair purple), 5–8 mm, blade 2–3 × 1–1.5 mm, margins not crisped, claw 3–4 mm; stamens in 3 unequal pairs; filaments: abaxial pair (connate to middle), 3–4 mm, lateral pair 1.5–2.5 mm, adaxial pair (completely connate, not recurved), 5–6 mm; anthers: abaxial and lateral pairs fertile, 1.4–1.7 mm, adaxial pairs sterile, 0.3–0.5 mm; gynophore 0.3–0.7 mm. |
Fruiting pedicels | divaricate-ascending, (straight), 4–7.5 mm. |
divaricate-ascending, 1–2.5(–4) mm. |
Fruits | ascending to spreading, smooth, straight or curved, flattened, 5–12.7 cm × 1.5–3 mm; valves each with obscure midvein (at least distally); replum straight; ovules 36–56 per ovary; style 0.8–2.5 mm; stigma subentire. |
divaricate-ascending, slightly torulose, straight to slightly curved, slightly flattened, 1.3–3 cm × 1–1.5 mm; valves each with obscure midvein; replum straight; ovules 12–22 per ovary; style 0.2–0.8 mm; stigma entire. |
Seeds | oblong, 2–3 × 1.4–2 mm; wing 0.1–0.2 mm wide at apex. |
oblong, 1.3–2 × 0.8–1.2 mm; wing 0.1–0.3 mm wide distally, (narrower at margin, rarely absent). |
2n | = 28. |
= 28. |
Streptanthus bernardinus |
Streptanthus batrachopus |
|
Phenology | Flowering Jun–Aug. | Flowering May–Jun. |
Habitat | Dry open pine or cypress woods, chaparral | Serpentine barrens and outcrops in chaparral |
Elevation | 1200-2500 m (3900-8200 ft) | 100-600 m (300-2000 ft) |
Distribution |
CA; Mexico (Baja California)
|
CA
|
Discussion | Streptanthus bernardinus is known from San Bernardino and San Diego counties; in Baja California it is restricted to Sierra Juárez and Sierra San Pedro Mártir. The chromosome number 2n = 14, reported by R. C. Rollins (1993) and by R. E. Buck et al. (1993), must be an error for n = 14. No other species of Streptanthus or its immediate generic relatives has such a low number. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Streptanthus batrachopus is known from Mt. Tamalpais, Marin County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 705. | FNA vol. 7, p. 705. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Streptanthus | Brassicaceae > tribe Thelypodieae > Streptanthus |
Sibling taxa | ||
Synonyms | Agianthus bernardinus, Agianthus jacobaeus, S. campestris var. bernardinus, S. campestris var. jacobaeus | |
Name authority | (Greene) Parish: Pl. World 20: 216. (1917) | J. L. Morrison: Madroño 4: 204, plate 31, figs. 20–28. (1938) |
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