Pabst and Braga named the type species in honour of Werner Rauh (1914–2000), specialist in Bromeliaceae at the University of Heidelberg, Germany. (MC).
WCM Protologue Reference:
Pabst & Braga, Bot. Jahrb. Syst. 99: 143 (1978)
Small (up to 3 cm tall) epiphytic, caespitose, sympodial herbs. Pseudobulb ovoid, sometimes producing keikis on old inflorescences, which makes these plants appear scandent. Leaves duplicate, bifacial, often with several leaf-bearing bracts (one to four) and a single (rarely two) terminal leaf, articulate, eventually deciduous, epetiolate. Inflorescences 1–3, lateral, glabrous, unbranched, pendent, usually longer than leaves, 1–10-flowered; bracts nearly as long as pedicels. Flowers usually resupinate or variously arranged, asymmetrical, spurless, yellow-green to yellow, often with reddish purple spots on labellum. Sepals and petals free, lanceolate, similar in size and shape except for longer lateral sepals, which are also falcate. Labellum ovate to nearly circular, unlobed, margins erose; callus a simple circular pad that is short-glandular and positioned at base of sigmoid column. Column sigmoid with a pair of arm-like appendages; anther dorsal to apical, anther-cap yellowish green with a usually downturned beak, pollinarium with an arched stipe that is much longer than pollinia, caudicles irregular, viscidium oval, entire, smaller than stipe, forward-projecting, pollinia four, yellow, globular; rostellum beaked, stigmatic cavity oval, near base of column, unlobed. Ovary glabrous. Capsules not seen. Seeds not seen. (MC, TB).