Description from Flora of China
Herbs, terrestrial, glabrous. Rhizome slender, creeping; roots unbranched, villous, with root hairs, arising mainly from nodes. Shoot arising from base of terminal or subterminal internode, with a persistent, tubular, acute, membranous scale at each node; sterile shoots with 1 terminal leaf, alternating with fertile ones, terminal internode not swollen or differentiated. Leaf spreading to suberect, plicate-venose, ovate, with a crimped or crenulate margin. Inflorescence terminal, 1-flowered; floral bracts similar to rhizome scales. Flower resupinate, not opening widely; ovary cylindric, glabrous. Sepals and petals entire, free; lateral sepals decurrent on column foot. Lip adnate to column foot, 3-lobed, spurred at base; lateral lobes erect; mid-lobe porrect; callus of 2 low, linear ridges. Column clavate, with a foot; anther cap with 2 4-locular thecae, incumbent, glabrous; pollinia 8, stipe present; stigma subelliptic; rostellum flaplike.
One species: SW China, S Japan, Vietnam.
(Authors: Chen Xinqi (陈心启 Chen Sing-chi); Jeffrey J. Wood)