rootstock a small tuber, with 1 or more stems, divided at the base into 2 or more prostrate branches 3–9 in. long, which are simple or again branching, puberulous with very minute retrorse hairs to nearly glabrous; leaves spreading; petiole 1/2–2 lin. long; blade 1 1/2–8 lin. long, 3/4–7 lin. broad, mostly lanceolate or ovate-lanceolate, acute, tapering into the petiole at the base, under cultivation becoming broadly ovate or orbicular, acute or obtuse and apiculate, and rounded to subcordate at the base, thinly puberulous above or glabrous on both sides; flowers solitary or in pairs at the nodes, or occasionally in shortly pedunculate 2-flowered umbels; pedicels 1 1/2–3 1/2 lin. long, thinly puberulous; sepals 1 lin. long, lanceolate, acuminate, recurved at the tips, nearly glabrous; corolla rotate, about 3 1/2 lin. in diam. when fresh, quite glabrous and not ciliate, dark purple-brown, with transverse dull yellowish lines on the basal part of the lobes, usually invisible on dried specimens; united part nearly flat; lobes free, 1 1/4–1 1/3 lin. long, 3/4 lin. broad, ovate, acute; outer corona of 5 small pouches alternating with and below the anthers, dark purple-brown; inner corona-lobes 1/4 lin. long, linear, closely incumbent upon the backs of the anthers and not exceeding them, dark purple-brown; staminal column 1/2 lin. long. null
