Sigmatostalix tenuirostris Kraenzl. 1922 Photo by Jay Pfahl.

Another Flower? Photo courtesy of Eric Hunt, plant grown by Dan Newman of Hanging Gardens.

Another Clone? Photo courtesy of Gilberto Escobar Copyright , and the Dr Leslie Garay Archives

Common Name The Delicate Rostrum Sigmatostalix

Occurs in Colombia around elevations of 1800 meters as a miniature sized, cool growing epiphyte with narrowly egg-shaped, bright, shiny, flattened, sharp-edged, longitudinally rugose pseudobulbs carrying a single, apical, dark green, linear to linear-lanceolate, acute leaf that is conduplicate basally and blooms in the spring on an axillary, 2 1/2 to 6" [6 to 15 cm] long, several flowered, paniculate inflorescence with the successively single flowers arising in clusters on short branches

There are three different flowers represented here and mine [the first] is the closest to the described plant. The Second 2 do not have the central tooth on the lip

Synonyms Oncidium tenuirostris [Kraenzl] Chase & NH Wms. 2008

References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 drawing fide to the first photo; Orchid Species Culture Oncidium/Odontoglossum Alliance Bakers 2006; AOS Bulletin Vol 77 No 12 2008 as Oncidium tenuirostris