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southern jewel flower

Laguna Mountain jewelflower, Laguna Mountains. jewel flower

Habit Perennials; (short-lived, caudex not woody); usually glabrous, (basal leaf blade margins pubescent, sometimes sepals). Perennials; (caudex woody, often elevated); (glaucous), glabrous, (petioles and sepal apices pubescent).
Stems

unbranched or branched, (few, glaucous), 6–15(–18) dm.

unbranched or branched (few), 2.5–8.6 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).

not rosulate; petiolate (petioles ciliate);

blade oblanceolate to spatulate, 2–8 cm (7–-25 mm wide), margins remotely dentate apically.

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.

blade ovate to lanceolate, 2–10 cm × 5–28 mm (smaller distally), base amplexicaul, margins entire, (apex acute to acuminate).

Racemes

ebracteate, (with densely clustered buds, later lax).

ebracteate, (lax in bud).

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 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.

Fruiting pedicels

divaricate-ascending, (straight), 5–18 mm.

divaricate-ascending, (straight), 4–7.5 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.

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.

Seeds

oblong, 2–3 × 1.4–2 mm;

wing 0.1–0.2 mm wide at apex.

oblong, 2–3 × 1.4–2 mm;

wing 0.1–0.2 mm wide at apex.

2n

= 28.

Streptanthus campestris

Streptanthus bernardinus

Phenology Flowering May–Jun. Flowering Jun–Aug.
Habitat Rocky openings in chaparral, open conifer forests, openings and after fires in chaparral-oak woodlands Dry open pine or cypress woods, chaparral
Elevation 900-2300 m (3000-7500 ft) 1200-2500 m (3900-8200 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
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.)

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.)

Source FNA vol. 7, p. 707. FNA vol. 7, p. 705.
Parent taxa Brassicaceae > tribe Thelypodieae > Streptanthus Brassicaceae > tribe Thelypodieae > Streptanthus
Sibling taxa
S. barbatus, S. barbiger, S. batrachopus, S. bernardinus, S. brachiatus, S. bracteatus, S. breweri, S. callistus, S. carinatus, S. cordatus, S. cutleri, S. diversifolius, S. drepanoides, S. farnsworthianus, S. fenestratus, S. glandulosus, S. gracilis, S. hesperidis, S. hispidus, S. howellii, S. hyacinthoides, S. insignis, S. longisiliquus, S. maculatus, S. morrisonii, S. oblanceolatus, S. oliganthus, S. petiolaris, S. platycarpus, S. polygaloides, S. squamiformis, S. tortuosus, S. vernalis, S. vimineus
S. barbatus, S. barbiger, S. batrachopus, S. brachiatus, S. bracteatus, S. breweri, S. callistus, S. campestris, S. carinatus, S. cordatus, S. cutleri, S. diversifolius, S. drepanoides, S. farnsworthianus, S. fenestratus, S. glandulosus, S. gracilis, S. hesperidis, S. hispidus, S. howellii, S. hyacinthoides, S. insignis, S. longisiliquus, S. maculatus, S. morrisonii, S. oblanceolatus, S. oliganthus, S. petiolaris, S. platycarpus, S. polygaloides, S. squamiformis, S. tortuosus, S. vernalis, S. vimineus
Synonyms Agianthus bernardinus, Agianthus jacobaeus, S. campestris var. bernardinus, S. campestris var. jacobaeus
Name authority S. Watson: Proc. Amer. Acad. Arts 25: 125. (1890) (Greene) Parish: Pl. World 20: 216. (1917)
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