Rootstock producing a cluster of succulent, fusiform roots. Stem annual, rather tough, single, simple, erect, 0.12-0.2 m tall, glabrous. Leaves sessile or shortly petiolate, oblong or elliptic-oblong, ±60 x 20 mm, apiculate, possibly somewhat fleshy, glabrous, somewhat glaucous. Flowers solitary, lateral at nodes, erect; pedicels up to 50 mm long. Sepals linear, acuminata, 10-15 mm long. Corolla 80-90 mm long; tube 25-45 mm long, ovoid-inflated at base to 5-7 mm diam., constricted to 3 mm and then widening to about 7 mm at mouth, glabrous outside and within, longitudinally tuberculate on veins within and veins purple-brown; lobes free, suberect-spreading, linear, 24-34 mm long, replicate, with greenish yellow pubescence on inner face and ciliate with long, clavate, yellow-based, vibratile, purple hairs near base and on middle of base of inner surface, dark purple-brown at mouth of tube. Corona arising 1 mm up staminal column; outer lobes forming 5 pockets at base, erect, deeply bifid, 2 mm long, lobules subulate, purple-brown, ciliate with long, fine, white hairs and pubescent on inner face; inner lobes arising from within base of outer corona, 3 mm long, incumbent-erect. Follicles 1-2, ±180 mm long, 5-6 mm diam.; seeds linear-oblong, ±12 x 5-6 mm, flattened, with broad margin.
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