O.tripterus Schltr., but differs markedly from that spe- 
cies in having smooth roots, densely glandular rachis and 
very dissimilar sepals and petals. 
Panama, Province of Coclé, lower portion of valley and marshes 
along Rio Anton, El Valle de Anton. “*Petals white, lip green.”’ At 
about 500 meters altitude. February 2, 1935. A. A. Hunter & P. H. 
Allen 383 (Type in Herb. Ames No. 42017): Valle de Antén, rim. 
At 2500 feet altitude. February 1936. Mrs. M.A. Purdom s.n. 
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