Languas calcarata (Roscoe) Merrill.

Pseudostems to 1.3 m. Leaves sessile; ligule 8--15 mm, glabrous, apex obtuse; leaf blade linear-lanceolate, 20--32 × 2--3.5 cm or narrower, glabrous, base attenuate, margin with well-spaced, short bristles, apex acuminate and caudate-mucronate. Panicles less than 10 cm; rachis slightly velvety; proximal branches 3- or 4-flowered; bracteoles oblong, to 1.7 cm, membranous, apex obtuse. Pedicel ca. 3 mm. Calyx to 1.2 cm, split on 1 side, pubescent, apex 3-toothed. Corolla tube white, ca. 9 mm; lobes oblong, ca. 2.2 cm. Lateral staminodes red, subulate, ca. 3 mm, adnate to base of labellum. Labellum white with rose red and purple streaks, obovate, 2.7--3.5 × 1.5--2 cm, apex emarginate. Filament ca. 1.3 cm; anther 5--7 mm. Ovary 3--4 mm in diam., sericeous. Capsule red, globose. Fl. May. 2 n = 48*.

Forests. Guangdong [India, Myanmar, Sri Lanka].