Tromotriche thudichumii (Pillans) L.C.Leach

Few-stemmed to clump-forming small succulent up to 150 mm diam., sometimes forming patches up to 0.5 m diam. of scattered stems. Stems above-ground 20-100(-200) mm long, 8-15 mm thick, decumbent, often spreading horizontally underground for up to 0.25 m then erect, usually brownish green; tubercles 1-2 mm long, obscure, joined into 4(-6) obscure and very obtuse angles along stem so that stem almost cylindrical, each tipped with small deltoid tooth (<1 mm long) flanked by 2 minute stipular denticles. Inflorescences 1-6, randomly distributed along stem, each bearing 1(-2) flowers ± without peduncle and with 1 or more deltoid acute bracts ±1 mm long at base; pedicel 6-15 mm long, 1.0-1.5 mm thick, spreading and holding flower facing ± horizontally; sepals (3-)5-8 mm long, <1.5 mm broad at base, lanceolate, acute. Corolla 20-30 mm diam., ± rotate-reflexed; outside green to brownish with 3 purplish veins on each lobe; inside shiny red-brown changing to greenish towards tips of lobes and pale yellow in tube, all over (tube to edges of lobes) with small clavate to spherical or cylindrical papillae; tube 1.0-2.5 mm long, 6 mm broad, pentagonal, shallowly bowl-shaped, formed entirely by thickening of corolla into low annulus below bases of lobes in otherwise ± flat central part; lobes 8-10 mm long, 10-13 mm broad at base, strongly reflexed to wrap around stem, broadly ovate-deltate, acute, margins somewhat folded back, with vibratile purple to white clavate cilia 1-2 mm long all along margins (longest near bases of lobes). Corona ±5 mm tall, 6-8 mm broad, raised on relatively slender pale yellow cylindrical stipe ±1 mm long; outer lobes 2.0-2.5 mm long, ascending-spreading, ± rectangular, truncate to bifid at apex, usually channelled down inner surface, dark brown becoming yellow towards base; inner lobes ±2 mm long, adpressed to backs of anthers and ascending in column to crossing over in centre, dorsiventrally flattened near base then terete and swelling slightly into clavate-tuberculate apex, with spreading laterally flattened narrowly deltoid horn 1.5-2.5 mm long at base, pale to dark brown becoming yellow towards base.