Sensitive
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...
Dwarf annual with 1 to many stems; leaf blades about 1 mm broad, flat or involute, short; culms mostly 5-15 cm tall; panicle narrow, few-flowered, the branches erect-appressed; spikelets 4-6 mm long; glumes shorter than the first floret, broad, stron...
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...
Herbaceous perennial; stems mostly single and unbranched, glabrous, slender, 4-10(12) dm tall; leaves opposite, lanceolate to ovate, acute, obtuse to cordate at base, coarsely and unevenly laciniate-serrate, thin, glabrous except sparsely glandular p...
Herbaceous perennial, 4-11 dm tall, with 1-several stems; leaves glabrous, opposite or whorled, broadly lanceolate to ovate, coarsely serrate, thin, 6-8 cm long; inflorescence a loose, few-branched, terminal panicle, somewhat glandular pubescent; flo...
Glabrous annual herb 10-20 cm high with a single stem branching distally or from near the base; leaves basal and cauline, alternate, twice- or thrice-ternately compound, ultimate divisions filiform, broadly ovate in outline, basal leaves usually with...
Annual, glabrous throughout; stems and leaves glaucous (bluish); stems 3-6 dm tall, simple below, branched from about 1 dm upward; leaves somewhat fleshy, greenish and minutely punctate above, slate-colored and nonpunctate below; lower stem leaves se...
Annual, grayish green branching herb, up to 30 cm tall; herbage glabrous throughout and slightly fleshy; leaves 3-7 cm long, 1.5-3.0 cm wide, deeply dissected into lobes; flowers minute; sepals 2 mm long or less; petals 4, white, 3.5 mm long; fruit a...
Caespitose or pulvinate, taprooted perennial, 2-10 cm tall; stems intricately branched; leaves narrowly oblanceolate, 8-20 mm long, 1-3 mm wide, strigose-canescent to canescent basally, moderately succulent; heads terminal; peduncles 3-8 mm long, den...