Imperiled
Broomlike shrub up to 1.5 m tall; stems many-branched, covered with silvery, matted, feltlike hairs out of which protrude numerous small oil blisters; leaves needlelike, alternate, 5-12 mm long; heads 3-4, terminal on stems; flowers 3, rarely 4, per ...
Perennial; stems several, to about 5 cm tall, suffrutescent and mat forming; leaves numerous, 2-4 cm long, to 3.5 mm wide, oblanceolate, tips acute, tapering to the base, 3-nerved, entire or with an occasional minute tooth, stem leaves somewhat small...
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 ...
Perennial herb; stems spreading to prostrate, about 60 cm long; herbage rough-hairy; leaves lance-shaped, petioles short-winged or petioles absent; flowers with a long tube and spreading petals, yellow, becoming deep red in age; petals 5-6 cm long; h...
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...
Annual, much branched at base, 2-8 cm tall; culms erect, with 1 node, papillose-pilose, mostly obscured by the leaves; leaves with prominently veined, papillose-pilose sheaths; ligules 0.2 mm long, membranous and with short hairs; blades 1-4 cm long,...
Succulent perennial herb; taproot tuberous, roughly globose to broadly napiform, up to 5 cm in diameter (usually less); stems short, usually not extending above the ground surface, terminated by a leafy rosette 5-15 cm in diameter; leaves terete, 3-1...
Biennial or short-lived perennial, usually densely pubescent, the hairs sessile or short-stipitate, simple or forked, 5- to 9-rayed, smooth or finely granular; stems several, erect or the outer ones decumbent or procumbent, simple or sometimes much b...
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...