Plants 18-60 cm tall. Stem erect, green, 2.5-3.5 mm in diam., with 3-6 leaves. Leaves petiolate, abaxially pale green, adaxially dark green, ovate, elliptic, or ovate-lanceolate, sometimes slightly oblique, 4.5-10 × 2-6 cm, abaxially with 3 conspicuous veins, base broadly cuneate or obtuse, apex acute; petiole 2.4-4 cm, basally dilated into amplexicaul sheath. Peduncle 12-40 cm, pubescent, with 3-6 sterile bracts; rachis 5-10 cm, pubescent, subdensely many flowered; floral bracts reddish brown, lanceolate, 10-12 × ca. 4 mm, abaxially pubescent, apex acuminate. Flowers small; sepals pubescent outside, reddish brown or brownish green outside, white with pinkish markings inside; ovary reddish brown, twisted, terete, pubescent, including pedicel 9-10 mm. Dorsal sepal erect, concave, narrowly elliptic, 4-6 × 1.5-2.5 mm, apex slightly obtuse; lateral sepals spreading, obliquely elliptic or ovate-elliptic, 5.5-6 × ca. 3 mm, apex acute or slightly obtuse. Petals similar in color to sepals, oblanceolate, 4-6 × 1.5-2 mm, midvein transparent, apex obtuse; lip reddish brown adaxially, 4-5.5 mm, 3-lobed at apex; lateral lobes erect, small; mid-lobe reflexed, white, broadly ovate to triangular-ovate, apex subacute; spur pendulous, reddish brown, tubular, 1.5-4 mm, centrally slightly dilated, glabrous, apex shallowly 2-lobed. Column erect, 1.5-4 mm, bearing up to 3 anthers in some Taiwanese populations. Fl. Apr-May.
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