Streptanthus drepanoides |
Streptanthus oblanceolatus |
|
---|---|---|
sickle fruit jewel flower |
Trinity River jewel-flower |
|
Habit | Annuals; (glaucous), usually glabrous, (sometimes sepals pubescent). | Biennials; (glaucous), glabrous throughout. |
Stems | unbranched or divaricately branched basally, 0.4–3.5(–4.5) dm. |
(base woody), virgately branched distally, 5–10 dm. |
Basal leaves | (soon withered); not rosulate; subsessile or shortly petiolate; blade orbicular, similar to cauline, margins with blunt teeth. |
rosulate; petiolate; blade oblanceolate, 3.5–7 cm, margins coarsely dentate distally. |
Cauline leaves | blade (succulent), orbicular or orbicular-ovate, 1.3–9 cm × 10–75 mm (smaller distally), base auriculate-cordate, strongly overlapping, margins entire or shallowly dentate. |
blade linear-lanceolate, 2–10 cm, (much smaller distally), base auriculate, margins entire. |
Racemes | ebracteate, (dense). |
bracteate below or between proximalmost 1 or 2 flowers, (lax). |
Flowers | calyx urceolate; sepals greenish yellow, (ovate), 5–7 mm, keeled, (apex reflexed, glabrous or pilose); petals ochroleucous (with brownish purple veins), 7–10 mm, blade 2–3 × 1–1.5 mm, margins crisped, claw 5–7 mm, wider than blade, (apex recurved); stamens in 3 unequal pairs; filaments: abaxial pair (connate to middle), 5–6 mm, lateral pair 3–4 mm, adaxial pair (connate to apex), 8–10 mm; anthers: abaxial and lateral pairs fertile, 1.8–2.5 mm, adaxial pair sterile, 0.7–1 mm; gynophore 0.5–1 mm. |
calyx shape unknown; sepals yellow, 8–9 mm, slightly keeled, (apex acuminate, recurved); petals yellowish, 12–16 mm, blade 4–5 × 0.5–1 mm, (adaxial pair slightly longer), margins not crisped, claw 7–9 mm, wider than blade, (apex recurved); stamens in 3 unequal pairs; filaments: abaxial pair (distinct), 9–11 mm, lateral pair 7–9 mm, adaxial pair (connate distal to middle of their length), 13–16 mm; anthers: abaxial and lateral pairs fertile, 3–3.5 mm, adaxial pair sterile, ca. 1 mm. |
Fruiting pedicels | divaricate-ascending, (straight), 1.5–4 mm. |
ascending, 3–6 mm, (strongly expanded at receptacle). |
Fruits | divaricate-ascending, usually smooth, rarely slightly torulose, strongly falcate, slightly flattened, 3–9 cm × 1–1.2 mm; valves each with obscure midvein; replum straight; ovules 30–50 per ovary; style 0.5–1 mm; stigma entire. |
divaricate ascending, torulose, flattened, 4–8 cm × 1.5–2 mm; replum straight; ovules per ovary unknown; style to 1 mm; stigma entire. |
Seeds | oblong, 1–1.5 × 0.7–1 mm; wing 0–0.1 mm wide, distal. |
oblong, ca. 2 × 1 mm; wing distal. |
2n | = 28. |
|
Streptanthus drepanoides |
Streptanthus oblanceolatus |
|
Phenology | Flowering May–Jul. | Flowering Jun–Jul. |
Habitat | Steep mobile substrate on sedimentary or volcanic slopes, usually on serpentine outcrops, openings in chaparral, pine woodland | Cliffs and canyon walls in conifer forests |
Elevation | 200-1800 m (700-5900 ft) | ca. 400 m (ca. 1300 ft) |
Distribution |
CA
|
CA |
Discussion | Streptanthus drepanoides is distributed in Butte, Colusa, Glenn, Shasta, Tehama, and Trinity counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Streptanthus oblanceolatus is known from Box Canyon, Trinity River, Trinity County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 711. | FNA vol. 7, p. 719. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Streptanthus | Brassicaceae > tribe Thelypodieae > Streptanthus |
Sibling taxa | ||
Name authority | Kruckeberg & J. L. Morrison: Madroño 30: 230, figs. 1, 2b. (1983) | T. W. Nelson & J. P. Nelson: Madroño 56: 127, fig. 1. (2009) |
Web links |