Description from Flora of China
Herbs perennial. Pseudostems erect, leafy. Leaves sessile or petiolate; ligule 2-lobed, small. Inflorescences terminal; bracts 1--10, distichous, lanceolate, 1--4-flowered, margin free to base; bracteoles absent in species with 1-flowered bracts. Calyx tubular, not deeply split on 1 side, apex often 2- or 3-toothed. Corolla tube long, narrow, widened at mouth; lobes 3, central one slightly longer and wider than lateral ones. Lateral staminodes petaloid, large. Labellum orbicular or broadly ovate, large, ± concave, apex entire or 2-lobed. Filament very short or absent, borne on corolla tube; anther basifixed; connective forming a conspicuously reflexed crest. Ovary 3-loculed. Stylodes linear, short, free.
About ten species: China, India, Myanmar, Sikkim, Thailand; one species (endemic) in China.