stems 1/2–1 1/4 ft. high, sometimes longer under cultivation, sparingly branched, acutely 4-angled, with slightly concave sides and acute spreading teeth 1–1 1/2 lin. long on the angles, glabrous, glaucous-green; flowers 1–3 together, from the sides of the upper part of the stems, successively developed; pedicels 3–5 lin. long, glabrous; sepals 2 1/2–4 lin. long, lanceolate, acuminate, glabrous; corolla with the lobes very much recurved (sometimes so as to touch the back of the flower) and then 1 1/4–1 1/2 in. in diam., glabrous and smooth on both surfaces, pale purple, dull purple or purple-brown, paler on the disk, with the central depression or a star-shaped central area pale greenish-yellow or cream-colour, ciliate to the tips of the lobes with long vibratile clavate purple hairs; disk with a short tube-like depression about 1/3 in. in diam., enclosing the corona, not raised into a ring around its mouth; lobes 7–9 lin. long and as much in breadth, ovate, acute or shortly acuminate; outer corona-lobes 1 1/4–1 1/2 lin. long, 1–1 1/4 lin. broad, subrectangular, slightly narrowing at the 3-toothed apex, purple-brown with a yellowish base; inner corona-lobes 2-horned, purple-brown at the base, dull yellowish dusted with dull purple-brown on the upper part; outer horns spreading, 3/4–1 1/2 lin. long, laterally flattened, slenderly linear, obtuse; inner horns connivent-erect at the base, recurving above, 2–3 lin. long, filiform, clavate and very minutely tuberculate at the apex; follicles subparallel, 5–6 in. long, about 5 lin. thick, fusiform, tapering into an acute slightly hooked beak, smooth, glabrous, glaucous?; seeds about 3 1/2 lin. long, 2 lin. broad, flattish, ovate, with a thickened margin, smooth, brown. null