Sensitive
Herbaceous perennial; stems erect, strict, to 60 cm tall, from a basal rosette, pubescent with small, retrorsely barbed hairs and long barbed hairs with the tip acute and the base surrounded by support cells; rosette leaves and stem leaves pinnately ...
Densely tufted perennial 5-25 cm tall, covered with minute, harsh, retrorsely barbed hairs that give the surface the texture of shark skin or a cat's tongue; basal leaves spatulate, dentate, with 2-4 teeth per side, or sometimes the smallest leaves n...
Biennial taprooted herbs; stems solitary, erect, straight; branches distal or along entire stem (candelabra-form); leaf blades 32.8-112.2 x 2.9-11.4 mm, intersinus distance at widest point 1-2.9 mm; proximal oblanceolate to elliptic, margins pinnate,...
Perennial herb; stems several from the base, white, stout, leafy, 2.2-8 dm tall, sparsely covered with minute, reflexed or spreading barbed hairs; basal leaves not persistent; stem leaves entire or with a few short laciniate lobes, linear to narrowly...
Dense, more or less hemispherical, perennial herb or sub-shrub from a branched, woody caudex, 1-3 dm high; stems and leaves pubescent with appressed, 3-rayed to dendritic trichomes; leaves alternate, succulent, (18-)22-40(-48) mm long, (4-)6-12(-14) ...
Stem consisting of loosely attached flattened joints up to 8 cm in length by 2-3 cm in width, the joints highly varied in size and shape, bearing areoles with dense clumps of yellowish glochids; rhizomes and often larger roots also often bearing gloc...
Small, cushion-forming perennial herb with a branched caudex; stems erect or ascending, 2.5-6(-10) cm high, hirtellous, mostly obscured by the opposite leaves; stipules lanceolate, scarious, 5-8 mm long and generally equaling the leaves, to 1.5 mm wi...
Perennial herb up to about 25 cm tall, grayish-hairy with straight hairs that lie against the surface of the foliage; stems with a thin, cord-like, easily broken, subterranean portion bearing a few small bracts, and a very short aerial, leafy portion...
Root large, fleshy, round at the top, tapering; stems 2 m long, pale gray-green, slender, 1-2.5 cm in diameter, strongly angled by the 4-6 low, broad ribs; areoles narrowly oval about 4 mm long, white to gray woolly, bearing approximately 12 gray to ...