Perennial; stems from a woody base, up to 20 cm long, soft-hairy; leaves narrow, not exceeding 3 mm wide and 50 mm long; flowers in loose clusters, bright pink to purple; corolla tube about 15 mm long, the lobes 6-10 mm long, 4-6 mm wide; calyx-lobes...
Annual or biennial, densely pubescent; trichomes sessile or short-stipitate, smooth or fine granular, rays long and slender, simple or infrequently forked near base, not appressed, some rays erect; stems several, stout and erect or the outer ones dec...
Perennial herb forming low, cushion-shaped clumps from an intricately branching, subterranean caudex; herbage silvery-gray, covered with a crust of flattened, stellate hairs; hairs usually with 5 main rays, each twice bifurcate into 20 tips, rays som...
Long-lived, low growing perennial with diffusely branching root crown (caudex) forming mounded clumps 1-3 dm in diameter; herbage densely covered with overlapping gear-shaped (stellate-discoid) trichomes; stems 3-10 cm long; basal leaves narrowly obl...
Annual herbs, stems 2-15 cm tall, succulent, branches ascending, yellow-white or reddish-purple, glabrous or sparsely farinose; leaves entire, alternate, fleshy, ovate to suborbicular, 5-15 mm long; flowers monoecious; bracts of female flowers triang...
Mat-forming perennial herb from a woody base; stems numerous, glabrous, slender, mostly prostrate, branching, 1-5 cm long, green; leaves ovate-elliptic, 1.5-4 mm long, slightly fleshy; flowers 1 or 2, at the ends of branches, rose-purple and white; p...
Stems unbranched (occasionally 2-3-branched near base), green, ovoid to elongate-cylindric, 2.9-25(-35) × 2.8-12.5(-20) cm; ribs usually (11-)13(-15), well developed, tubercles evident on ribs. Spines obscuring stems; radial spines 4-6...
Stems usually solitary, depressed-globose to ovoid, 3.2-11.0 cm long, 3.8-8.0 cm in diameter; ribs 13-17; tubercles inconspicuous; areoles woolly; central spines absent or rarely 1, radial spines 7-13, straw-colored, spreading, 6-13 mm long; flowers ...
Perennial herb; stem up to 7 dm tall, leafy throughout, but the leaves progressively reduced upwards; leaves bright green, thin, lanceolate to narrowly triangular, up to 14 cm long and 5 cm wide, those at the base with petioles up to 7 cm long, the s...
