Perennial herb. Rootstock with cluster of fusiform roots. Stem 1(-2), erect, sparingly branched throughout, up to about 0.3 m tall, with few hairs near nodes and in thin line down side or glabrescent. Leaves linear to oblong-linear, subsessile, up to about 50 mm long, minutely scabrous along midrib below, slightly scabrid-ciliate on margin. Flowers 1-3, lateral at nodes; pedicels 6-10 mm long, slender. Sepals linear-lanceolate, about 2 mm long. Corolla 6-7 mm long, divided nearly to base, white, tinged with pink; tube saucer-shaped; lobes oblong, 6-7 mm long, erect, with recurved margins and keeled face, acute, papillate-pubescent on margin. Corona with outer lobes deeply 2-1obulate, appearing 10-1obate, with lobules curved laterally, minutely papillate; inner lobes linear, incumbent-erect, nearly 2.2 mm long, twice as long as outer lobes. Pollinia with upper half of inner margin translucent, shortly basally attached to carrier. Follicles 1-2, slender, up to ±0.15 m long.
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