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Pacific jewelflower

plumed jewelflower, San Benito jewelflower

Habit Perennials; (caudex branched); glabrous, (sepals and leaf blade apices pubescent). Annuals; hirsute-hispid throughout.
Stems

(sometimes ascending), unbranched or branched (few), 1.5–8(–9.2) dm.

unbranched or branched distally, 1.2–6 dm.

Basal leaves

subrosulate (in juvenile plants); shortly petiolate;

blade obovate, 1–2.7 cm (5–14 mm wide), margins dentate apically (teeth with relatively short, bristly trichomes).

not rosulate; shortly petiolate;

blade lanceolate to oblanceolate, 2–8 cm, margins coarsely dentate to pinnatifid.

Cauline leaves

blade (fleshy), broadly ovate to orbicular, 0.7–3.5 cm × 5–24 mm (not smaller distally), base auriculate to amplexicaul, (proximally overlapping, distally not overlapping), margins usually entire, (apex obtuse).

blade lanceolate, 1.3–9 cm × 2–20 mm, (smaller distally), base auriculate, margins dentate.

Racemes

ebracteate, (lax in fruit).

ebracteate, (lax, with a terminal cluster of dark purple or greenish yellow sterile flowers).

Flowers

calyx campanulate;

sepals (ascending), yellowish green (in bud) or purple (in flower), (ovate), 4–7 mm, not keeled, (apex with short, bristly, flattened trichomes);

petals purplish (with darker veins), 5–9 mm, blade 0.5–3 × 0.3–0.7 mm, margins slightly crisped, claw 4–7 mm, wider than blade;

stamens in 3 unequal pairs;

filaments (distinct): abaxial pair 4–6 mm, lateral pair 3–5 mm, adaxial pair 5–7 mm;

anthers (all) fertile, 2.5–3.5 mm;

gynophore 1–3 mm.

calyx campanulate;

sepals (of fertile flowers) dark purple, purplish, or greenish yellow, (oblong to lanceolate), 4–6 mm, (8–14 mm in sterile flowers), not or slightly keeled, (hirsute-hispid in fertile flowers, glabrous in sterile flowers);

petals: (abaxial pair spreading and reflexed, adaxial pair parallel and erect), purplish white, lemon-yellow, or yellowish white (with darker midvein), 7–12 mm, blade 2–4 × 1–2 mm, margins crisped, claw 5–8 mm, about as wide as blade;

stamens in 3 unequal pairs;

filaments: abaxial pair (distinct), 4–6 mm, lateral pair 3–4 mm, adaxial pair (connate their entire length), 6–9 mm;

anthers: abaxial and lateral pairs fertile, 1.3–2 mm, adaxial pairs sterile, 0.2–0.7 mm;

gynophore 0.4–1 mm.

Fruiting pedicels

erect to ascending, (straight), 3–8 mm.

divaricate to ascending, (straight, curved upward, or recurved), 3–8 mm.

Fruits

erect to ascending, smooth, often strongly recurved distally, distinctly flattened, 2–7(–8.2) cm × 2–3 mm;

valves each with obscure midvein (sometimes not basally, margins somewhat thickened);

replum straight;

ovules 16–30 per ovary;

style 0.4–1 mm;

stigma entire.

ascending or reflexed, smooth, straight or slightly curved, flattened, 3.5–11.4 cm × 1.5–2 mm;

valves each with prominent midvein, (glabrate or sparsely to densely hispid, trichomes to 1.7 mm);

replum straight;

ovules 32–94 per ovary;

style 1–2 mm;

stigma entire.

Seeds

oblong to broadly ovoid, 3–4 × 1.7–2 mm;

wing (0–)0.1–0.25 mm wide at apex, (narrower at margin).

broadly oblong, 1.4–2 × 1–1.3 mm;

wing 0.15–0.3 mm wide, continuous.

2n

= 28, 56.

Streptanthus barbatus

Streptanthus insignis

Phenology Flowering Jun–Aug.
Habitat Dry, open Jeffrey pine woods, gravelly serpentine grounds in forest openings
Elevation 800-2200 m (2600-7200 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Streptanthus barbatus is known from Siskiyou, Tehama, and Trinity counties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Subspecies 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Racemes with terminal cluster of sterile flowers dark purple; sepals of fertile flowers dark purplish; petals purplish white; fruit valves usually glabrate or sparsely hispid, rarely densely so.
subsp. insignis
1. Racemes with terminal cluster of sterile flowers greenish yellow or purple; sepals of fertile flowers greenish yellow or purplish; petals lemon-yellow or yellowish white; fruit valves moderately to densely hispid.
subsp. lyonii
Source FNA vol. 7, p. 704. FNA vol. 7, p. 717.
Parent taxa Brassicaceae > tribe Thelypodieae > Streptanthus Brassicaceae > tribe Thelypodieae > Streptanthus
Sibling taxa
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. 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. longisiliquus, S. maculatus, S. morrisonii, S. oblanceolatus, S. oliganthus, S. petiolaris, S. platycarpus, S. polygaloides, S. squamiformis, S. tortuosus, S. vernalis, S. vimineus
Subordinate taxa
S. insignis subsp. insignis, S. insignis subsp. lyonii
Synonyms Cartiera barbata
Name authority S. Watson: Proc. Amer. Acad. Arts 25: 125. (1890) Jepson: Man. Fl. Pl. Calif., 420. (1925)
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