Tridentea

Dwarf succulents, tufted, forming compact clumps, rarely slightly rhizomatous. Stems decumbent, obtusely 4(-6)-angled, softly fleshy, smooth, glabrous to the naked eye, tubercles submammose, each bearing a thick, glabrous, subulate, widely spreading, caducous leaf 1.5-10.0 mm long (leaving a whitish scar), subtended by a patch of stipular hairs on either side sometimes extending along margin. Inflorescence glabrous, 1 per stem, arising near base of stem with 1-5 flowers developing in gradual succession on a stout, gradually lengthening peduncle and pedicels (up to 80 mm long), spreading to ascending. Calyx 5-lobed, glabrous or with few marginal cilia. Corolla rotate to campanulate, usually lobed to +/- half of radius or less, 20-100 mm in diameter, with shallow, funnel-shaped depression in centre, outside glabrous, inside glabrous and smooth to slightly rugose or papillate (papillae often with apical cilia), margins usually ciliate. Corona 2-seriate, arising from staminal column, glabrous; outer corona of 5 ascending to spreading, dorsiventrally flattened, simple to bifid or trifid lobes, fused only at base to bases of inner lobes; inner lobes incumbent on anthers, usually much exceeding them and rising up above centre of style head, dorsiventrally flattened at least towards base (often cylindrical above), often with laterally flattened, +/- deltoid dorsal 'fin' in lower half. Staminal column arising near base of corolla tube on short stipe; style head not produced beyond anthers, truncate depressed at apex. Anthers 2-locular, incumbent on top of style head, subquadrate, horizontal, without apical or lateral appendages. Pollinia nearly horizontal, D-shaped, with short caudicles, corpuscle winged, +/- as long as broad. Follicles terete-fusiform, slender, mottled with purple, glabrous, smooth. x = 11.