Geophytic herb 145-450 mm tall, all parts with milky latex. Stems usually solitary, otherwise branched from neck; neck 60 mm long; tuber 56 x 15 mm; older stems sparsely pilose to villous and pronouncedly terete. Leaves opposite, sessile or petiolate then <5 mm long, narrowly lanceolate to lanceolate, 13-125 x 2-5 mm, base attenuate, apex apiculate, margin revolute, distinct midvein much paler, much longer than internodes; glabrous. Peduncle short, inflorescences appearing sessile but peduncle 1-3.5 mm long (12-19 mm long in fruit), sparsely pilose; pedicel 1-4(-5 mm long in fruit), sparsely pilose. Inflorescence axillary, umbellate, 3-8 per stem, 4-10-flowered; bracts linear to filiform, 2.2-3.0 mm long, apex acute, sparsely pilose towards the base and centre below. Calyx narrowly deltate, 3.2-4.7 x 1.2-1.4 mm, apex acute, sparsely pilose towards the base and centre below. Flowers pseudo-urceolate, 4.5-7.1 x 3.9-5.8 mm (recurved apical tips excluded, these 1.12 mm long), segments fused for lower 0.9-1.5 mm (lower fifth), upper 3-4 mm free but tightly joined below; segments ovate, 2.5-2.7 x 1.6-2.0 mm, green on the outside and whitish-pink on the inside. Corona lobes 3.9-6.3 x 1.5-2.2 x 0.8-1.0 with stype in ± lower fifth, lower half ovate dilating into thin apical extension half the length of the full lobe; outer margin convex with appendix inwardly directed, inner margin concave, upper half abruptly extended into narrow tip. Basal flaps 0.32 mm long. Gynostegial column 5.26 mm tall, gynostegial head 1.1-2.3 x 1.6-2.3 mm, ±half the length of the gynostegial column. Anthers 1.1-1.9 x 0.6-1.1 mm; anther appendages ovate, 1.18-1.64 x 0.80-1.1, apex acute to rounded; anther-wings 1.32-2.71 x 0.33-0.52 mm, notched ± third from base. Pollinarium: pollinia ± unevenly deltoid narrower at apex where attached to caudicle, 0.584-1.318 x 0.255-0.607 mm, inner-margin straight, outer-margin rounded; caudicle 0.198-0.498 x 0.103-0.113 mm, lower end attached to pollinia; corpuscle narrowly ovate, 0.318-0.747 x 0.086-0.209 (0.223-0.498) mm with horn included and with lateral horn 82-147 µm; upper end attached to corpuscle, winged and 0.151-0.181 mm broad and flattened. Fruit 41-91 x 5-7 mm, longitudinally striped in two shades of green, sparsely pilose. Seed not seen.
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