Plants rather large. Rhizome nearly creeping, stout, 1-2 cm in diam., with sparse ovate scales. Stem erect, red-brown, 30-170 cm, apical half shortly rusty tomentose. Inflorescence terminal and lateral; lateral raceme 3-7(-10) cm, 4-9-flowered, base with a few ovate-lanceolate sterile bracts 1.5-2.5 cm; floral bracts ovate, 2-3 mm, abaxially with rusty hairs; pedicel and ovary 1.5-2 cm, shortly rusty tomentose. Flowers yellow, ± tinged with red-brown. Sepals elliptic-ovate, ca. 2 cm, abaxially shortly rusty tomentose. Petals similar to sepals, slightly narrower, glabrous; lip nearly broadly ovate, shorter than sepals, adaxially hairy-papillose or occasionally crested-lamellate along main veins, margin irregularly dentate or erose. Column ca. 7 mm. Fruit blood-red, suboblong, 7-13 × 1.5-2.5 cm, fleshy. Seeds with surrounding wing; wing less than 1 mm wide. Fl. May-Jul, fr. Sep. 2n = 28.
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