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King's gold

Habit Plants pilose basally, trichomes (soft), simple, to 1.5 mm, these rarely mixed with fewer, forked, stalked ones, sparsely pubescent distally.
Stems

ascending or decumbent, 0.3–2.5 dm.

Basal leaves

not seen.

Cauline leaves

(proximal) petiole to 1 cm or (distal and bracts) subsessile;

blade 2.5–4.5 cm (smaller distally), margins pinnatifid to pinnatisect (less divided distally);

lobes 2–4 on each side, oblong to linear, 0.3–1.5 cm × 1–3 mm, shorter than terminal, margins entire.

Flowers

sepals 1.2–2 × 0.7–0.9 mm, glabrous;

petals (not with purple tinge), oblanceolate to spatulate, 1.6–2.5 × 0.7–0.9 mm, cuneate into short claw;

filaments 1.2–1.7 mm;

anthers 0.3–0.4 mm.

Fruiting pedicels

divaricate-ascending, straight, 3–10(–28) mm, pilose.

Fruits

obdeltoid, 4–5 × 4–5 mm, length equal to width;

valves 2, thin-leathery proximally, thick-leathery to subwoody and tuberculate-rugose on outside distally, puberulent, trichomes simple, antrorse, these sometimes mixed with minute, 1-forked ones;

septum present;

ovules 4–8 per ovary;

style 0.3–0.9 mm.

Seeds

brown, 1.2–1.5 × 0.6–0.9 mm.

Tropidocarpum californicum

Phenology Flowering Mar.
Habitat Subalkaline clay in scrub
Elevation ca. 70 m (ca. 200 ft)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Tropidocarpum californicum is known from adjacent parts of Kern and King counties in San Joaquin Valley.

of conservation concern

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

Source FNA vol. 7, p. 533.
Parent taxa Brassicaceae > tribe Descurainieae > Tropidocarpum
Sibling taxa
T. capparideum, T. gracile
Synonyms Twisselmannia californica
Name authority (Al-Shehbaz) Al-Shehbaz: Novon 13: 393. (2003)
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