Chasmatophyllum

Dwarf shrublets, tufted or producing prostrate branches, often forming small mats. Leaves opposite, sheathing at base, 6-8 on branchlets, often oblong or spatulate, obtusely keeled, often obtusely toothed on margins and keel, surface somewhat warty and rough. Flowers solitary, terminal, pedicellate, ebracteate, 20-50 mm in diameter; open from late afternoon to early evening. Sepals 5, unequal, 3-angled. Petals 2- or 3-seriate, lanceolate, golden yellow, with reddish tips. Stamens many, converging. Nectary of 5 separate, somewhat crenulate glands, distinct. Ovary: top flat or nearly so; placentas parietal; stigmas 5, filiform. Fruit a 5-locular capsule, of Drosanthemum type; with broad valve wings; covering membranes present. Seeds obtusely hooked, somewhat rough, small, light yellow. F lowering in summer. D istinguishing characters: small, compact, creeping perennials; leaves with soft whitish teeth; flowers yellow.