Plants 15-30 cm tall. Stems pale green, ridged, with 1-2 tubular sheaths near base, 7-15 cm long below leaves. Leaves green, sometimes tinged with white along veins, deltoid or ovate-triangular, 2.3-4 cm long, 1-3 cm wide, apex acute or acuminate, base truncate, more or less wavy-crisped along margins. Raceme 3-8 cm long, 10-22-flowered, peduncle and rachis 4-6-ridged, puberulous or glabrous but sparsely short-tuberculate; bracts ovate, 1-2.5 mm long, 1-1.5 mm wide, acute; pedicel and ovary 3.2- 4.5 mm long, green and tinged with purple along ridges, ovary nearly globose. Flowers not widely spreading; dorsal sepal ovate, 1.5-2.5 mm long, 1-1.5 mm wide, acute; lateral sepals ovate or obliquely-ovate, 1.5-2.5 mm long, 1-2 mm wide, acute or obtuse; petals oblanceolate or oblong, 1.5-2 mm long, 0.5-0.8 mm wide, obtuse; lip elongate-cuneate, 4-8 mm long, 1-2 mm wide, base with small, rounded or square auricles slightly surrounding base of column, 2-lobed from near middle, lobes divergent, linear, 2-4 mm long, 0.5-0.7 mm wide at base, acute or acuminate at apex, sinus with triangular tooth, disc with thick longitudinal fleshy keel running from sinus to base; column 1-1.5 mm long, nearly sessile; anther cordate-ovoid, fleshy, 1 mm long; stigma crescent-like to semiorbicular; rostellum ovate, nearly erect, 1 mm long.

TAIPEI: Tsaikongkengshan, Su 9583; Hu 210; Chiang 466; Pataoerhshan, Lin 417, 438; Ying 3582; North Chiatienshan, Ying 4706. TAITUNG: Doushan, Su 8885*; Hsinkangshan, Lin 479. HUALIEN: Yenhai, Su 9493; Chingshuishan, Su 9501; Hu 212; 428. ILAN: Taipingshan, Huang 10794.

Endemic. Forests at 800-2,000 m.