S1
Critically Imperiled
Polygala rimulicola var. mescalerorum (Mescalero Milkwort)
Mat-forming perennial herb from a woody base; stems numerous, glabrous, slender, mostly prostrate, branching, 1-5 cm long, green; leaves ovate-elliptic, 1.5-4 mm long, slightly fleshy; flowers 1 or 2, at the ends of branches, rose-purple and white; p...
Puccinellia parishii (Parish's Alkali Grass)
Dwarf annual with 1 to many stems; leaf blades about 1 mm broad, flat or involute, short; culms mostly 5-15 cm tall; panicle narrow, few-flowered, the branches erect-appressed; spikelets 4-6 mm long; glumes shorter than the first floret, broad, stron...
Salix arizonica (Arizona Willow)
Shrub forming a prostrate mat, large hedge, or thicket several centimeters to 3 m tall (typically less than 8 dm tall); leaves petiolate, 1.0-4.5 cm long, 0.5-2.2 cm wide, broadly elliptic to ovate, with rounded or cordate bases, margins finely serra...
Solidago capulinensis (Capulin Goldenrod)
Perennial herb; stems ascending-erect, (4-) 8-12 dm tall, moderately puberulent and branching on the upper half; leaves densely arranged on the stems, thick textured, elliptic-lanceolate to elliptic-oblanceolate, 4-7 cm long, 12-20 mm wide, smaller i...
Spermolepis organensis (Organ Mountain Scaleseed)
Glabrous annual herb 10-20 cm high with a single stem branching distally or from near the base; leaves basal and cauline, alternate, twice- or thrice-ternately compound, ultimate divisions filiform, broadly ovate in outline, basal leaves usually with...
Stellaria porsildii (Porsild's Starwort)
Perennial herb with slender rhizomes; stems erect, growing in clumps, but not densely matted, 9-18 cm tall, glabrous; leaves opposite, sessile, linear to linear-lanceolate, 27-35 mm long, ciliate at base; flowers solitary in upper leaf axils; peduncl...
Synthyris oblongifolia (Egg-Leaf Coral-Drops)
Perennial herb; stems to 30 cm high, densely hairy, usually with 12-16 small bract-like leaves below the flower cluster; basal leaves oblong, mostly 7-11 cm long, 25-30 mm wide, rounded at the tip, with rounded teeth on the margins; petioles about 5-...
Talinum brachypodium (Laguna Fame Flower)
Small, succulent perennial herb; taproot thickened, tuberous, often branched; stems, tufted, few-branched, procumbent; leaves alternate, crowded on stem, nearly terete, usually blunt or obtuse apically, 1.5-2.5 cm long and 1.5-2.5 mm thick, light gla...