Description from Flora of China
Glossula tentaculata Lindley, Bot. Reg. 10: ad t. 862. 1825; Glossaspis antennifera H. G. Reichenbach; G. tentaculata (Lindley) Sprengel; Habenaria garrettii Rolfe ex Downie; H. tentaculata (Lindley) H. G. Reichenbach; Peristylus garrettii (Rolfe ex Downie) J. J. Wood & Ormerod.
Plants slender to somewhat robust, 16-45(-60) cm tall. Tubers subglobose to ovoid, 1-2.2 × 0.5-1 cm. Stem with 2 or 3 tubular sheaths at base, 2-5-leaved. Leaves basal to somewhat spaced along stem, ovate-oblong to lanceolate, 4-9(-12) × 0.8-1.5(-3) cm, base attenuate, apex acute. Inflorescence 10-34(-48) cm; peduncle cylindric, slender to stout; sterile bracts several, lanceolate, 5-12 mm; rachis 4.5-17 cm, subdensely many flowered; floral bracts ovate to ovate-lanceolate, 5-8 mm, shorter than to almost as long as ovary, apex acuminate. Flowers erect, green or yellowish green; ovary 6-10 mm including pedicel. Dorsal sepal erect, oblong-ovate, concave, ca. 2.8 × 1-1.5 mm, 1-veined, apex obtuse; lateral sepals spreading, oblong-ovate, slightly oblique, ca. 3 × 1.2 mm, slightly narrower than dorsal sepal, 1-veined, apex obtuse. Petals connivent with dorsal sepal and forming a hood, ovate-oblong, slightly oblique, ca. 3 × 1.5 mm, 1-veined, apex obtuse; lip oblong, 2.8-3.5 × ca. 0.8 mm, divided near base by a transverse ridge into a short, concave hypochile and a longer, deflexed, deeply 3-lobed epichile, ecallose; lateral lobes spreading at right angles to axis of lip, filiform, 10-18 mm; mid-lobe narrowly oblong-ligulate, ca. 2 mm, apex obtuse; spur pendulous, globose-saccate, 1-2.5 mm, apex usually shallowly 2-lobed, neck contracted. Column ca. 1 mm; viscidia ovate; rostellum with short arms. Fl. Nov-Apr.
Damp places on slopes, beside streams, wastelands; 100-300 m. S Fujian, S Guangdong, E Guangxi, Hainan, SE and W Yunnan [Cambodia, Thailand, Vietnam].