(pronounced: oh-don-toh-RINK-uss)


Cranichideae subtribe Spiranthinae


Terrestrials arising from fleshy, fasciculate roots. Leaves few, in a basal rosette, often absent at flowering. Inflorescences terminal, erect, pubescent, pedunculate racemes, the floral bracts conspicuous. Flowers tubular. Sepals and petals free, the backs of the speals pubescent. Lip obscurely lobes by a subterminal constriction, subsaccate at the base, without callus. Column club-shaped, the column apex simple, three-toothed with the central tooth (rostellum) longer, or five-toothed, without wings, with a short foot; pollinia 4, sessile on a common oblong viscidium.


From the Greek odonto, meaning tooth, and rhynchos, meaning snout, referring to the tooth-like rostellum and column apex.


A genus of five species restricted to high elevations of southern South America.

Care and Culture Card

See basic growing conditions and care information below.


Singer, R. B. and A. A. Cocucci 1999. Notas comparativas sobre Odontorrhynchus castillonii (Orchidaceae: Spiranthinae). Kurtziana 27(2):387-390.