A completely glabrous perennial succulent. Stem 0·20–1·20 m. high, erect, simple, terete, with sterile shoots at the base. Leaves ternate or alternate in the adult plant, opposite in the first nodes of the young shoots, ± caducous at flowering time, 1·5–13 cm. long and 2–6 mm. in diameter, terete, slightly canaliculate on the upper face, with 2–9 small apical teeth producing pseudbulbils in their axils, sessile, usually straight, erect to spreading, fleshy, greyish- or dull-green, spotted with dark green or red. Flowers in cymes forming a terminal, rather dense corymbose inflorescence up to 10–15 cm. in diameter; pedicels 6–20 mm. long. Calyx equalling 1/4–1/3 of corolla, campanulate, green striped with red; tube 2·5–5 mm. long; lobes 5·8–7·7 x 3·7–5·7 mm., lanceolate, very acute. Corolla reddish–orange or reddish–ochre below, pale yellow suffused with red upwards; tube 22–5·35 mm. long, rather constricted just above the carpels, subfunnel–shaped–campanulate upwards; lobes 7–10·2 x 7–9·8 mm., obovate, obtuse or truncate, apiculate, spreading. Stamens attaining the top of corolla; filaments inserted below the middle of the corolla–tube; anthers 1–2 x 1–1·7 mm., broadly ovate. Carpels c. 6·15 mm. long, adnate for c. 1·65 mm.; styles 19·5 mm. long. Scales 0·7–1·6 x 0·85–1·4 mm., semicircular to trapeziform. Seeds 0·6 x 0·3 mm., obovoid.