Streptanthus batrachopus |
Streptanthus hyacinthoides |
|
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Mt. Tamalpais jewelflower, Tamalpais jewel flower |
smooth jewelflower, smooth twistflower |
|
Habit | Annuals; (glaucous), glabrous throughout. | Annuals; usually glabrous throughout (sometimes stem bases pubescent). |
Stems | unbranched or branched basally, 0.3–1.7(–2.8) dm. |
unbranched or branched distally, 2.8–13 dm. |
Basal leaves | (soon withered); not rosulate; shortly petiolate; blade (succulent, mottled), obovate to oblanceolate, 0.5–2 cm, margins coarsely dentate. |
not seen. |
Cauline leaves | blade lanceolate, 0.5–2.5 cm × 1–7 mm (smaller distally), base auriculate, margins entire or dentate (entire distally). |
(shortly petiolate or sessile); blade usually linear to linear-lanceolate, rarely oblanceolate, 2.5–16 cm × 2–7(–20) mm, (smaller distally), base not auriculate, margins entire. |
Racemes | ebracteate (lax, sometimes secund). |
ebracteate. |
Flowers | 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. |
(slightly zygomorphic, horizontal to pendent); calyx campanulate; sepals purple, lanceolate, 7–11 mm, not keeled; petals deep purple to magenta or whitish (with purple veins), 13–20 mm, blade 7–12 × 1–4 mm, margins not crisped, claw 5–12 mm, (strongly recurved); stamens in 3 unequal pairs; filaments: abaxial pair (connate less than 1/2 their length), 8–14 mm, lateral pair 4–7 mm, adaxial pair (connate ca. 3/4 their length), 7–10 mm; anthers: abaxial and lateral pairs fertile, 2–3 mm, adaxial pairs sterile, 1–1.5 mm; gynophore 0.3–3 mm. |
Fruiting pedicels | divaricate-ascending, 1–2.5(–4) mm. |
divaricate-ascending, (straight), 3–10 mm. |
Fruits | 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. |
divaricate-ascending, smooth, straight or slightly curved inwards, flattened, 3.7–11.2 cm × 1.5–2 mm; valves each with prominent midvein; replum straight; ovules 90–120 per ovary; style 0.3–1.5 mm; stigma subentire. |
Seeds | oblong, 1.3–2 × 0.8–1.2 mm; wing 0.1–0.3 mm wide distally, (narrower at margin, rarely absent). |
broadly ovoid, 1.5–1.8 × 1–1.3 mm; wing 0.1–0.25 mm, continuous. |
2n | = 28. |
|
Streptanthus batrachopus |
Streptanthus hyacinthoides |
|
Phenology | Flowering May–Jun. | Flowering May–Jun. |
Habitat | Serpentine barrens and outcrops in chaparral | Sandy soils of prairies, open glades in woods, grassy roadsides |
Elevation | 100-600 m (300-2000 ft) | 100-800 m (300-2600 ft) |
Distribution |
CA
|
AR; KS; LA; OK; TX
|
Discussion | Of conservation concern. Streptanthus batrachopus is known from Mt. Tamalpais, Marin County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Streptanthus hyacinthoides is widespread in eastern Texas and central and northwestern Oklahoma; in Arkansas it is restricted to Nevada and Ouachita counties; in Kansas to Barber and Comanche counties; and in Louisiana to Bienville, Caddo, Natchitoches, and Winn parishes. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 705. | FNA vol. 7, p. 716. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Streptanthus | Brassicaceae > tribe Thelypodieae > Streptanthus |
Sibling taxa | ||
Synonyms | Erysimum hyacinthoides, Euklisia hyacinthoides, Icianthus atratus, Icianthus glabrifolius, Icianthus hyacinthoides, S. glabrifolius | |
Name authority | J. L. Morrison: Madroño 4: 204, plate 31, figs. 20–28. (1938) | Hooker: Bot. Mag. 63: plate 3516. (1836) |
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