Platanthera clavigera Lindley Gen. Sp. Orchid. Pl. 289. 1835.

藏南舌唇兰 zang nan she chun lan

Habenaria clavigera (Lindley) Dandy; H. densa Wallich ex Lindley; Habenella clavigera (Lindley) Szlachetko & Kras-Lapinska; H. densa (Wallich ex Lindley) Szlachetko & Kras-Lapinska; Platanthera densa (Wallich ex Lindley) Soó (1929), not Freyn (1896); Platantheroides clavigera (Lindley) Szlachetko; P. densa (Wallich ex Lindley) Szlachetko.

Plants 18-62 cm tall. Rootstock tuberous, ovoid, 1-2 cm. Stem stout, with 2 or 3 tubular sheaths at base, 4- or 5-leaved. Leaves cauline, widely spaced, narrowly ovate to oblong, 3.5-10 × 1.5-3 cm, base clasping, apex acuminate. Peduncle with 1 foliaceous bract; rachis cylindric, 8-30 cm, densely many flowered; floral bracts lanceolate, pubescent, apex acuminate. Flowers yellowish green; pedicel and ovary cylindric-fusiform, 8-12 mm. Dorsal sepal erect and connivent with petals, elliptic-oblong, cymbiform, 3-5 × 2-2.6 mm, pubescent, 3-veined, margin ciliate, apex obtuse; lateral sepals spreading or reflexed, elliptic-oblong to elliptic-lanceolate, oblique, 4-5.5 × 1.8-2.5 mm, pubescent, 3-veined, margin ciliate, apex obtuse. Petals oblong-ovate, oblique, 3.5-5 × 1.8-2.2 mm, fleshy, 3-veined, apex acute; lip linear, 5-5.5 × ca. 1 mm, entire, apex obtuse; disk with a conic callus in front of mouth of spur; spur pendulous, clavate, 5-6 mm, much shorter than ovary. Column erect, short; staminodes small, elliptic; anther locules nearly parallel; pollinia subglobose, with very short caudicles and large, orbicular viscidia; rostellum erect, small; stigma lobes separate, raised, shortly clavate to narrowly oblong, spreading on either side of base of lip. Capsule ovoid, ridged. Fl. Aug-Sep.

Forests, scrub, grasslands along valleys, flooded wastelands; 2300-3400 m. S Xizang [Bhutan, India, Kashmir, Nepal].