Stems 2-4(-6) dm × 3-10 mm, from short rootstocks with pale brown, stout roots. Leaves opposite or mostly alternate, sessile or short-petiolate, becoming scarcely smaller distally; blade green or yellow-green, often glaucous, ovate to obovate, oblanceolate, or spatulate, 2-11 × 0.5-4.5 cm, base cuneate, margins entire to remotely or coarsely dentate, apex acute to rounded. Cymes lax, 3-15 cm diam. Pedicels ca. 2 mm. Flowers fertile, 5-16 mm diam.; sepals lanceolate, 2-4 mm; petals white or pink-tinged to pinkish, with greenish keel, 4-8 mm; stamens 5, ca. 1/2 as long as petals; pistils 5, 3-4 mm; styles 1.5-2 mm; nectaries pinkish, quadrate, 0.5-1 mm, wider than long. 2n = 24.
On rocks, ledges and crevices of cliffs, rocky slopes, crests of bluffs, rocky woods; at elevations from 50-2,000 metres.
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