central keel being much reduced below. Column short, 
stout, about 5.8 mm. high at the back, prominently 
winged throughout with the wing on each side gradu- 
ally dilated from the apex to the base of the column 
where it is adnate to the basal sac of the lip. 
This species appears to be distinct from all of the other 
members of its genus by reason of the muricate or sub- 
conical appendages on the back of the sepals and by the 
subquadrate-pandurate lip. 
Cuzco: Prov. of Paucartambo, Pillahuata, ‘‘epifita, rara; periantio 
rosa-palido, blanquecino, transparente, exteriormente ‘mamillate,’ ”’ 
January 25, 1945, C. Vargas 4953 (Tyrer in Herb. Ames No. 63135). 
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