Plants solitary or tufted, with bulbils on caudices. Leaves basal; petiole flattened, 1-3 cm; blade broadly ovate to triangular, 1-3 cm, fleshy, base attenuate, margins coarsely serrate, ciliate, surfaces sparsely to moderately tangled, reddish brown-hairy abaxially, glabrous adaxially. Inflorescences (5-)10-40-flowered, congested, ± glomerate or capitate thyrses, 4-20 cm, usually densely yellow- to cream-tipped stipitate-glandular. Flowers: sepals ascending, ovate; petals white, not spotted, oblong to elliptic, clawed, 2-4 mm, 1.5+ times as long as sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary inferior, appearing more superior in fruit. Capsules purple, folliclelike. 2n = 20, 38, 40, 56. Flowering late spring-summer. Subalpine and alpine meadows; 1500-4600 m; Ariz., Colo., Idaho, Mont., N.Mex., Utah, Wyo. Micranthesrhomboidea is somewhat polymorphic; variants have been given taxonomic designations with little consistency. The chromosome number variation needs thorough study, as in other species of Micranthes, because no obvious correlations with morphology or geographic distribution are known (B. L. Bethers 1973). Reports from Canada (Alberta, Saskatchewan) were rejected as misidentifications of M. occidentalis.

Plant: perennial herb Leaves: all basal; blades ovate to rhombic, 1-4 cm long, the base attenuate, the margin usually serrate-serrulate; petiole 1-4 cm long, flattened INFLORESCENCE: 3-30 cm tall, condensed into 1-3 (-7) glomerules, sometimes more open, covered with pale yellow-tipped, glandular hairs Flowers: more than 10; sepals erect, ovate, sometimes purple-tipped; petals 2-4 mm long, longer than sepals, elliptic to slightly obovate; filaments lanceolate; ovary at least half inferior in flower, more superior in fruit; nectaries disk-like Fruit: FRUITS 2(-3) valved; SEEDS smooth to ridged Misc: Alpine and subalpine meadows; above 1500 m (5000 ft); Apr-Aug Notes: CAUDEX simple, sometimes branched; bulblets 0 REFERENCES: Elvander, Patrick. 1992. Saxifragaceae. Ariz.-Nev. Acad. Sci. 26(1)2.