Luisia filiformis

Plant epiphytic or lithophytic, pendent; roots basal. Stem branched, covered by leaf sheaths, 2-3mm thick; sheaths tubular, striate, 1.5-3.5cm long. Leaves from one side of stem only, linear, terete, rugose, jointed, 17-27 x 0.07-0.1cm. Infloresence piercing through leaf-sheath 2-4mm above its base, thick, 5- to 8-flowered; peduncle attenuate, sheathed; rachis 5-8mm long; floral bracts broadly ovate, boat-shaped, subacute, 1.5-2 x 1.5-2mm. Flowers 3-5mm across; sepals white, petals white with yellow tips, lip deep purple with white edges; pedicel and ovary 2-4mm long. Dorsal sepal ovate-elliptic, weakly hooded, subacute, keeled, 5 x 1.5mm; lateral sepals spreading, filiform, obtuse, 5-11 x 0.25-0.5mm. Lip 3-lobed, ecallose, 4-6 x 1.5-2mm; hypochile broadly triangular to wedge-shaped, margins recurved, lateral lobes short, rounded; epichile arising from narrowed hypochile, broadly obovate, surface ridged, ape x truncate to obovoid, margins weakly undulate, 3 x 2mm. Column 1-1.5 x 1-1.5mm; anther cap subquardate. Fruit obovoid, ridged, 3 x 0.5cm.