On the Rare Plant Technical Council List
Perennial, mat-forming herb with fibrous root system and slender rhizomes up to 15 cm long; leaves clustered at tips of rhizomes, 5-12 mm long, 1.0-3.5 mm wide, spatulate or obovate, broadest above the middle, tapering toward the petiole, margins en...
Perennial herb arising from a thick taproot with numerous, short (1-3 cm), ascending-erect caudex branches, the upper portion of these with persistent old leaf bases; stems erect, 5-8 cm tall, unbranched, green, sparsely short-strigose with white, st...
Low perennial; stems 3-8 cm tall, nearly hairless; leaves to 6 cm long, sparsely hairy mostly along the margins; basal leaves broader above the middle; stem leaves smaller than the basal and often linear; flower heads solitary on each stem; involucra...
Annuals; stems erect-spreading, 1.0-3.5 dm tall; basal leaf blades broadly elliptic, 1.5-2.5 cm long, glabrous and green on both surfaces except for scattered villous hairs along the margins and midvein; stem leaves similar to basal leaves, but more ...
Tufted, herbaceous, perennial, growing from a woody base; leaves basal, dark green, thick, glabrous above, sparsely hairy beneath, blade ovate to reniform, 1.0-2.0 cm long, 1.5-2.5 cm wide, petiole often longer than the blade; inflorescence an open l...
Perennial herb forming a flat mat or cushion-like mound up to 3.5 dm across from an intricately branching caudex; leaves all basal, short-petioled, the blade narrowly elliptic, 4-12 mm long, 1.5-3.5 mm wide, silky tomentose, the margins revolute; inf...
Perennial herb forming hemispheric mounds up to 3 dm across from an intricately branching caudex; leaves all basal, short-petiolate, the blade narrowly elliptic, 4-12 mm long, 1.5-4 mm wide, silky-tomentose below, green and strigose above, the margin...
Tufted perennial herb forming mats up to 5 dm across; leaves broadly elliptic, 3-5 cm long, 1.5-3.0 cm wide, margins entire, green above, white tomentose below; inflorescences branched 3-5 times, 2-5 dm tall; bracts leaflike, those of the first node ...
Herbaceous perennial with a basal rosette of leaves and a scapose stem to 1.5 m tall; basal leaves linear, up to 1 m long, entire or rarely with one or two spinose teeth; cauline leaves few and reduced; inflorescence a compound umbel with compact hea...