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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
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
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
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. 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. howellii, S. hyacinthoides, S. insignis, S. longisiliquus, S. maculatus, S. morrisonii, S. oliganthus, S. petiolaris, S. platycarpus, S. polygaloides, S. squamiformis, S. tortuosus, S. vernalis, S. vimineus
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)
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