Streptanthus campestris |
Streptanthus howellii |
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southern jewel flower |
Howell's jewel-flower, Howell's streptanthus |
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Habit | Perennials; (short-lived, caudex not woody); usually glabrous, (basal leaf blade margins pubescent, sometimes sepals). | Perennials; (caudex simple or branched); (glaucous), glabrous. |
Stems | unbranched or branched, (few, glaucous), 6–15(–18) dm. |
usually unbranched, rarely branched distally, 3–8 dm. |
Basal leaves | often rosulate; petiolate; blade (fleshy), oblanceolate to obovate, 3.5–21 cm, margins dentate, (bristly ciliate throughout or only teeth and petiole ciliate). |
(soon withered); not rosulate; petiolate; blade (somewhat fleshy), similar to cauline. |
Cauline leaves | blade lanceolate to narrowly ovate, 3.5–11(–15) cm × 6–14 mm (smaller distally), base auriculate to amplexicaul, margins usually entire or undulate, rarely dentate. |
(petiolate); blade broadly spatulate-obovate to suborbicular, or (distally) narrowly oblong-oblanceolate to linear, 1.5–10 cm × 5–45 mm, base (distally) cuneate to attenuate, not auriculate, margins entire, repand, or obtusely dentate, (entire distally). |
Racemes | ebracteate, (with densely clustered buds, later lax). |
ebracteate, (lax). |
Flowers | calyx campanulate; sepals (suberect), purple, (broadly ovate or oblong), 7–10 mm, not keeled, (apically bristly or not); petals light purple (with pale yellow claw), 9–12 mm, blade 2–3.5 × 0.5–1 mm, margins not crisped, claw 6–9 mm, wider than blade; stamens tetradynamous; filaments: median pairs (distinct), 6–8 mm, lateral pair 4–6 mm; anthers (all) fertile, 3–4 mm; gynophore 0.5–1.5 mm. |
calyx subcampanulate; sepals purplish, oblong, 5–8 mm, not keeled; petals maroon to purple, 8–12 mm, blade 3–5 × 0.5–1 mm, margins not crisped, claw 5–7 mm, wider than blade; stamens in 3 unequal pairs; filaments (distinct): abaxial pair 5–6 mm, lateral pair 4–5 mm, adaxial pair 6–7 mm; anthers (all) fertile, 3–3.5 mm; gynophore 0.5–5 mm. |
Fruiting pedicels | divaricate-ascending, (straight), 5–18 mm. |
divaricate to ascending, (straight), 7–17 mm. |
Fruits | spreading to ascending, smooth, slightly curved to straight, flattened, 6–14 cm × 2–3.5 mm; valves each with obscure midvein; replum straight; ovules 50–102 per ovary; style 1–3 mm; stigma 2-lobed. |
divaricate-ascending, smooth, straight to slightly curved inwards, flattened, 5.5–12 cm × 2.5–3.2(–3.5) mm; valves each with prominent midvein; replum straight; ovules 24–44 per ovary; style 0.3–3 mm; stigma subentire. |
Seeds | oblong, 2–3 × 1.4–2 mm; wing 0.1–0.2 mm wide at apex. |
broadly oblong to suborbicular, 3–4 × 2–3 mm; wing 0.5–1.1 mm wide, continuous. |
2n | = 28. |
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Streptanthus campestris |
Streptanthus howellii |
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Phenology | Flowering May–Jun. | Flowering Jun–Jul. |
Habitat | Rocky openings in chaparral, open conifer forests, openings and after fires in chaparral-oak woodlands | Dry serpentine slopes and ridges in open conifer-hardwood forests |
Elevation | 900-2300 m (3000-7500 ft) | 600-800 m (2000-2600 ft) |
Distribution |
CA; Mexico (Baja California)
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CA; OR |
Discussion | Of conservation concern. Streptanthus campestris is distributed in California in Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura counties, and in Baja California in Sierra San Pedro Mártir and Sierra Juárez. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Streptanthus howellii is known from the Klamath Mountains in California (Del Norte and Siskiyou counties) and Oregon (Curry and Josephine counties). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 707. | FNA vol. 7, p. 716. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Streptanthus | Brassicaceae > tribe Thelypodieae > Streptanthus |
Sibling taxa | ||
Synonyms | Cartiera howellii | |
Name authority | S. Watson: Proc. Amer. Acad. Arts 25: 125. (1890) | S. Watson: Proc. Amer. Acad. Arts 20: 353. (1885) |
Web links |