rootstock a tuber; stem slender, 1/2– 3/4 lin. thick, twining, glabrous, sometimes producing tubers at the nodes; leaves fleshy, but thin, rather rigid when alive; petiole 3–6 lin. long, marked with a slender blackish-purple ring at their base; blade 7–14 lin. long, 3–14 lin. broad, ovate to lanceolate, with a cordate, subcordate, rounded or cuneate base, acute, wavy or sometimes flat at the margins, glabrous, deep green or variegated with pale greenish along the veins above, pale green, with a darker midrib beneath, not shining; veins not conspicuous on either side; peduncles lateral at the nodes, 2–3 1/2 lin. long, 1–2-flowered, glabrous; pedicels 2 1/2–3 lin. long, glabrous; sepals 1 lin. long, subulate, glabrous; corolla-tube 9–10 lin. long, slightly curved, ellipsoid-inflated and 2 1/2 lin. in diam. at the base, cylindric and 1 lin. in diam. above, enlarging to 2 1/2–3 lin. in diam. at the funnel-shaped mouth, outside glabrous, nearly white at the base, very pale greenish above, inside thinly covered with deflexed white hairs except in the inflated base, where it is glabrous and marked with numerous minute greyish-green tubercles; lobes connivent-erect, connate at the tips, 3–3 1/2 lin. long, somewhat spathulate-linear from a deltoid base, being slightly broadened at the tips, as is best seen when in bud, closely replicate, keeled down the inner face and there covered with long deflexed purple hairs, glabrous on the back, light green at the base, rather darker green at the upper part, with an oblique transverse blackish-purple band just below the middle and a few dots below it; outer corona white, with 5 rounded sinuses or slight pockets alternating with 5 deltoid obtuse teeth 1/3 lin. long adnate to the back of the base of the inner corona-lobes and rising to about the level of the staminal column; inner corona-lobes white, 1 1/2 lin. long, flat, tapering below into a stalk-like base and from about the middle into fine subulate points, slightly divergent-erect, straight, not recurved at the tips, free or sometimes all connate at the middle and forming a sort of narrowly funnel-shaped basket above the staminal column. null
