Imperiled
Robust biennial or monocarpic perennial; stem strict, 1-2.5 m tall; basal leaves ample, succulent, 30 cm or more long, sinuate or pinnatifid, weakly prickly with short black spines, nearly glabrous, the thin weblike wool tardily deciduous; stem leave...
Small tree or shrub to 3 m tall; branches thorny, the thorns purplish brown, 3-4 cm in length; leaves simple, alternate and rhombic in outline, margins with 3-4 broad lobes on each side of the upper two-thirds of the leaf, these lobes with fine margi...
Taprooted, acaulescent, tufted, herbaceous perennial; leaves 1 or more times pinnately compound, ovate or broadly ovoid in outline, 2-6 cm wide, 4-8 cm long, glabrous or minutely scabrous on margins, petioles 1-10 cm long, leaflets sessile, filiform ...
Perennial herb 0.9-2.5 m tall; stems glabrous, green or bluish-green at the base; leaves all on stem and withered from the basal 1/5 of the stem at the time of anthesis, petioles 3-13 cm long, blades 8-18 cm long and 5-10 cm wide, palmately divided i...
Evergreen shrub, about 1 m tall; leaves pinnately compound with 7-13 oval, leathery, satiny pubescent leaflets; flowers pea-like, purple (rarely white), about 25 mm long; pods 5-14 cm long, 10-14 mm wide, slightly constricted between the seeds; seeds...
Herbaceous perennial with creeping rhizomes; stems 2.5-4.5 dm tall, sparsely branching from near the base, growing in clumps to about 3 dm in diameter; leaves alternate, oblong, about 1.0 cm long, glabrous except for occasional ciliate hairs on the m...
Perennial herb arising from a thick taproot with numerous, short (1-3 cm), ascending-erect caudex branches, the upper portion of these with persistent old leaf bases; stems erect, 5-8 cm tall, unbranched, green, sparsely short-strigose with white, st...
Annuals; stems erect-spreading, 1.0-3.5 dm tall; basal leaf blades broadly elliptic, 1.5-2.5 cm long, glabrous and green on both surfaces except for scattered villous hairs along the margins and midvein; stem leaves similar to basal leaves, but more ...
Stems solitary, growing in clumps, or commonly branched to form small dense clusters, the individual stems mostly 2-4 cm thick and to 15 cm long; tubercles on mature stems with upper surface bearing a groove; spines with a yellowish cast often reddis...