R
On the Rare Plant Technical Council List
Mentzelia humilis var. guadalupensis (Guadalupe Stickleaf)
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...
Mentzelia sivinskii (Sivinski's Blazingstar)
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,...
Mentzelia springeri (Springer's Blazing Star)
Perennial herb; stems several with numerous branches (bushy appearance), slender, 3-5 dm tall, white, glabrous to above the middle, puberulent near the top; basal leaves absent; lower stem leaves narrowly lanceolate to linear, up to 4 cm long, entir...
Mentzelia todiltoensis (Todilto Stickleaf)
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...
Microthelys rubrocallosa (Green Medusa Orchid)
Perennial herb; roots tuberous, 1-5, clustered, 0.2-1.4 cm in diameter; leaves deep blue-green, 1-2 (6), emerging prior to, or with, the inflorescence and fading shortly after anthesis (McVaugh [1985] observed leafless flowering plants bearing wither...
Muhlenbergia villiflora var. villosa (Hairy Muhly)
Rhizomatous perennial; stems much branched above, wiry, 4-30 cm tall, usually growing in isolated clumps and seldom forming dense stands; blades short, less than 3 cm long, strongly involute; inflorescence a narrow contracted panicle, 1-5 cm long, us...
Nama xylopodum (Yellowseed Fiddleleaf)
Herbaceous perennial; stems 5-12 cm long, erect or ascending, freely branching from a woody crown; leaves alternate, oblanceolate to spatulate, sharply pointed, weakly revolute, 5-20 mm long and 2-4 mm wide; stem and leaves grayish and strigose-hispi...
Nerisyrenia hypercorax (Crow Flats Fanmustard)
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) ...