Forming small mats with short, sterile stems from a branched caudex. Stems prostrate to ascending, densely leafy at the base; fertile stems 2–6 cm, glabrous. Leaves glabrous, succulent, ciliate, spatulate, 3–7 mm long. Inflorescence of 1 to 3 flowers. Flowers: calyx saucer-shaped with lobes spreading, 2–3 mm long, glabrous; hypanthium <0.5 mm long; petals oblong, 3–5 mm long, white; ovary slightly inferior. Capsule 5–9 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Open, moist, gravelly soil of slopes and rock ledges in the alpine and subalpine zones.