The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

southern jewel flower

Howell's jewel-flower, Howell's streptanthus

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.

Streptanthus campestris

Streptanthus howellii

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
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[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.)

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
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. bernardinus, 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. 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 Cartiera howellii
Name authority S. Watson: Proc. Amer. Acad. Arts 25: 125. (1890) S. Watson: Proc. Amer. Acad. Arts 20: 353. (1885)
Web links