Tuber globose, 3/4–1 in. in diam. Stem 1 1/2–3 ft. high, twining, more or less densely pubescent or subtomentose with jointed hairs. Leaves herbaceous; petiole 1/3– 2/3 in. long; blade 1–2 3/4 in. long, 1/3– 3/4 in. broad, lanceolate or oblong-lanceolate, acuminate, rounded or cuneately rounded at the base, pubescent on both sides. Umbels 3–4-flowered, subsessile or on peduncles about 1 lin. long, all parts, including the outside of the corolla, covered with spreading jointed hairs; bracts 1 1/2–3 lin. long, subulate, recurving; pedicels 4–7 lin. long, rather slender. Sepals 3 1/2–4 lin. long, lanceolate, acuminate. Corolla straight; tube 1/4 in. long, about 2 lin. in diam., tubular-campanulate, not inflated at the base, pubescent outside, glabrous? inside; lobes twice as long as the tube, 6–7 lin. long, linear from a deltoid base, replicate, suberect, with free tips, densely and minutely puberulous on the inner face, reticulate with dark-coloured veins on their basal part, at the base the angles formed by their union project abruptly beyond the diameter of the tube. Outer coronal-lobes arising 1/2 lin. above the base of the staminal-column and reduced to 5 small pouches not reaching to the level of the base of the anthers; inner coronal-lobes about 1/3 lin. long, linear-oblong, obtuse, incumbent on the backs of the anthers and not produced beyond them. Staminal-column with 5 linear blackish markings immediately under the outer coronal-lobes.
