Ansellia Lindl.

Medium-sized to large epiphytic or rarely terrestrial or lithophytic herbs. Pseudo-bulbs clustered, fusiform, several-noded, ridged when older, leafy in apical half, surrounded at base by many erect bristly roots. Leaves plicate, large, several in apical part of pseudobulb. Inflorescence axillary, from apical nodes, arcuate, paniculate, laxly many-flowered. Flowers large, showy, pale greenish yellow or pale to rich yellow, ± spotted (often heavily) with red or dark maroon. Sepals and petals subsimilar, spreading. Lip porrect, 3-lobed, bearing several longitudinal ridges; side lobes erect on each side of column. Column porrect; pollinia 4 in 2 pairs, ovoid and 2 sizes, attached to not easily distinguished viscidium.