rootstock very large; stems 1–2 ft. long, tortuous or twining, puberulous or very shortly and softly pubescent; leaves very shortly petiolate, deflexed, 1/3– 7/8 in. long, 1/4– 1/2 in. broad, elliptic-oblong, obtuse, apiculate, rounded at the base, slightly folded lengthwise, undulate, shortly pubescent on both sides; flowers 3–5 together, lateral at the nodes; pedicels 1–2 lin. long, minutely tomentose, as are the 3/4–1 lin.-long lanceolate acute sepals; corolla puberulous outside and on the inner face; tube about 1 1/3 lin. (scarcely 2 lin., Endlicher) long, campanulate; lobes very spreading, 3–3 1/2 lin. long, linear-lanceolate, more or less twisted, truncate at the apex, with revolute margins, green; corona arising near the base of the corolla-tube, white, about 2 lin. long, the lower half tubular and about as long as the corolla-tube, divided above into 5 trifid segments alternating with 5 small recurving entire or bifid teeth, middle tooth of the trifid segments filiform, as long as the tube and 3–4 times as long as the lateral teeth, which are decurrent within the tube as 5 pairs of wing-like keels, between which, at the middle of the tube, arise 5 other filiform teeth in one series opposite the middle teeth and reaching to the level of the lateral teeth of the trifid segments; anther-appendages as long as or slightly exceeding the coronal tube. null