Large epiphyte. Pseudobulbs ovoid, to 10 cm long, furrowed. Leaves 2, strap-like, to 35 cm long, to 1.5 cm wide. Flowers non-resupinate, 3?10, to 3 cm wide, white inside, pink outside; autumn to winter. Sepals and petals similar, obovate to elliptic, pointed, lateral sepals narrowest and joined at base. Labellum violin shaped, curved, margins wavy, callus yellow with red spots. Syn. Odontoglossum pulchellum Lindl.

Mexico, Guatemala and El Salvador.

O. convallarioides Schltr. from Mexico and C America is a medium sized epiphyte with erect racemes of few small mostly white flowers that may be suffused with pink and have purplish spots on the labellum.

Source: Jeanes, J. (2005). Orchidaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.