Climbing, epiphytic herb. Roots usually emerging from nodes near base or lower portion of stem. Stem climbing, with elongated internodes. Leaves many, distichous, rigid, slightly decurved or held horizontally to stem, elliptic, shortly sheathing at base, deciduous, apex unequally but smoothly bilobed. Inflorescence axillary, unbranched, racemose, few-flowered, much longer than leaves. Flowers showy, resupinate, widely opening, uniform bright sulphuryellow throughout. Sepals and petals free, similar, obovate, slightly reflexed. Labellum immobile, trilobed, with a short spur, side lobes erect and connate to midlobe, midlobe spreading. Column lacking a foot; pollinia two, porate, stipe spatulate, viscidium bilobed.