Tromotriche choanantha (Lavranos & Harry Hall) Bruyns

Succulent spreading to form loose clump or pendent from ledges on cliffs. Stems 40 mm-2 m long, 6-12 mm thick, prostrate or ascending then soon arching back to ground and sometimes somewhat rhizomatous, usually purple-green; tubercles very obscure so stem obscurely and very obtusely 4-angled to almost cylindrical, without apical tooth. Inflorescences 1 to several per stem arising towards base of young stems, each bearing 1-5 flowers developing in gradual succession on stout peduncle up to 5 mm long (while stem still short, usually becoming inactive once stem elongates); pedicel ±10 mm long, 1.5 mm thick, spreading with slightly descending apex so that flower facing horizontally or slightly nodding; sepals 2.5-3.5 mm long, 1 mm broad at base, lanceolate, acute. Corolla 20-25 mm diam., tubular-campanulate; outside pink towards base becoming maroon above middle and on lobes, usually with 1 outstanding vein on each lobe; inside dark maroon, smooth; tube 11-16 mm long, 10-12 mm broad, distinctly pentagonal, conical to nearly cylindrical, with corolla thickened in lower half except near base so that overhanging ‘annulus’ arises near base; lobes 5-6 mm long, 7-8 mm broad at base, erect to spreading, deltate, acute, very slightly convex on inner surface but margins not reflexed, eciliate or very rarely with vibratile flattened cilia ±1.5 mm long near bases. Corona ±8 mm tall, 4-5 mm broad, maroon, raised on distinct stipe almost 1 mm long; outer lobes 2.5-3.0 mm long, ±1.2 mm broad, nearly erect, ± rectangular, divided in upper 1 mm into 2 erect acute teeth and a small truncate toothlet between them to truncate and finely and equally 3-toothed, deeply channelled down inner surface; inner lobes 5-6 mm long, adpressed to backs of anthers then erect and connivent then spreading towards apices, dorsiventrally flattened in lower ±1 mm then terete and filiform, obtuse to very slightly rugulose at apex, with nearly erect slender laterally flattened obtuse dorsal horn 3.0-3.5 mm long arising near base.