Imperiled
Stems solitary, few in a clump, or commonly branched to form small dense clusters of 20 or more stems, the individual stems mostly 2-4 cm thick, to 15 cm tall; tubercles on mature stems with upper surface grooved; spines about 20-60 per areole, sprea...
Erect, herbaceous perennial, 40-100 cm tall, glandular and eglandular hairs throughout; basal leaves in a more or less persistent rosette, palmately 5-parted, blade 3.7-4.4 cm long, 4.8-5.6 cm wide; stem leaves opposite, stipulate, 3-5-parted, the se...
Perennial herbs; stems (15)20-30(40) cm tall, few to numerous, ascending or very shortly decumbent, woody below, herbaceous above, branching frequently in lower half, villous below, sparsely to densely puberulent above with tightly retrorse hairs; le...
Rhizomatous, perennial herb, the rhizomes slender and unbranched; stems several, unbranched, clustered, somewhat woody at the base, 10-20 cm tall; leaves opposite, 8-15 mm long, 2.5-5.0 mm wide, sessile, oblong-lanceolate, tip rounded to acute, margi...
Annual, 1-2 m tall, branched above, stem glabrous to hispid; leaves opposite below, alternate above, up to 17.5 cm long by 8.5 cm wide, lanceolate with 3 prominent veins, base tapering to a short petiole, margins entire except for a few prominent tee...
Perennial, rhizomatous herb; stems greater than 15 cm tall, glandular pubescent, bearing leaves in basal clusters; leaves broadly oval to rotund, cordate, palmately lobed and broadly toothed, upper surface glabrous, lower surface glandular pubescent;...
Perennial herb; stems one or a few from a branching base, 2-5 dm tall, glabrous or sparsely pubescent in the inflorescence; leaves once or twice parted into narrowly linear lobes; inflorescence corymbose (flat-topped); involucre of flower heads 8-10 ...
Tufted perennial; stems mostly less than 2.5 cm long, rarely up to 10 cm long; leaves spatulate, upper leaves much smaller than the lower, 6-18 mm long, up to 3 mm wide, margins with short, stiff hairs; flower heads solitary at the ends of stems; inv...
Suffrutescent perennial, 8-15 cm tall; leaves sessile, linear to oblanceolate, strigillose, mostly 10-15 mm long, 1.5-4 mm wide, acute to rounded at the apex, margins flat; flowers solitary, sessile in the leaf axils, bractlets linear-subulate to lin...