stems erect, branching and shortly decumbent at the base, 4–8 in. long, 3/4–1 1/4 in. square, pubescent, light dull green; angles much compressed, with erect rudimentary leaves 1–1 1/2 lin. long on the small teeth; flowers 1–2 together, near the base or towards the middle of the stems; pedicels about 2 in. long, 2 1/2 lin. (in fruit about 1/2 in.) thick, softly pubescent; sepals 4–5 lin. long, lanceolate, acuminate, pubescent; corolla very large, in bud pentagonally ovoid, acuminate, when expanded 11–16 in. in diam., with the united part disk-like, shallowly depressed at the centre; back pubescent; inner surface transversely rugulose and thinly covered all over with long fine erect pale purplish hairs and ciliate with similar but longer hairs, light ochreous-yellow, everywhere marked with transverse crimson lines; lobes 4–6 1/4 in. long, 2–2 3/4 in. broad, ovate-lanceolate, acuminate, very spreading or recurved, slightly convex, scarcely revolute at the margins; outer corona-lobes ascending-spreading, slightly recurved at the apex, 2 1/2–3 lin. long, 1 1/4 lin. broad, oblong, slightly concave down the face, 3-toothed at the apex, with the middle tooth subulate, acute and longer than the obtuse side teeth, glabrous, dark purple-brown; inner corona-lobes dark purple-brown, with the dorsal wing free to the base, ascending, 2–3 lin. long, 1–1 1/2 lin. broad, oblong or subdeltoid-oblong, obtuse or acute, entire; inner horn 2–3 lin. long, erect, subulate, rather obtuse, nearly straight; follicles slightly diverging, 5–6 1/2 in. long, 2/3 in. thick, subterete, tapering to an obtuse slightly hooked apex, pubescent. null