rootstock a large tuber; stems several, clustered, usually simple, erect, tortuous or sometimes twining, 1/2–1 1/2 ft. long, puberulous with minute curved hairs; leaves subsessile or very shortly petiolate, 2/3–4 1/2 in. long, 1–3 lin. broad, linear, acute, narrowed or rounded into the petiole at the base, quite glabrous or thinly puberulous, with minute curved hairs above and on the midrib beneath; flowers 2–6 together in sessile clusters at the nodes; pedicels 1/4– 2/3 lin. long, whitish-puberulous; sepals 2/3–1 1/2 lin. long, subulate to narrowly lanceolate, acute, whitish-puberulous; corolla-tube 1/2– 3/4 lin. long; lobes very spreading, 1/2– 2/3 in. long, 2/3– 3/4 lin. broad at the base, linear or linear-filiform from being revolute at the margins and somewhat twisted, whitish-puberulous or minutely tomentose on the back, glabrous on the inner face, apparently greenish; corona about 4 times as long as the corolla-tube, white, 2 1/2–3 lin. long, tubular for half its length, variably divided above, sometimes into 5 long trifid segments alternating with 5 short teeth, sometimes into many irregular teeth about 1/2 lin. long, with 5 long simple linear-filiform or trifid processes arising within the tube at or near its top, and in front of these or of the trifid segments arise below the middle or near the base of the tube 5 other filiform processes, usually hooked or revolute at the apex and varying from half as long to as long as the tube; lateral teeth of the trifid segments or processes one quarter as long as the linear-filiform middle tooth; anther-appendages reaching to about the middle of the corona-tube. null
