longe fimbriato, ceterum eroso-denticulato, disco basin 
callo trapezoideo, denticulato, cum callo 8-lobo ante- 
posito ornato; toto labello excepto callo minutissimime 
puberulo, 25 mm. longo, antice 20 mm. lato; columna 
humili, satis crassa, alis faleato-triangularibus ornata; 
ovario pedicellato usque ad 3 cm. longo. 
Botivia: Naranjillos, road to Cochabamba, 11 km. southwest from 
Santa Cruz. Coll. J. Stacy s.n.! Type (AMES). 
This new species is somewhat allied to O. Jonesianum 
Rehb.f. of the Section Teretifoliae but differs from it 
in having larger flowers, different coloration and a very 
lacerate lip. As a matter of fact, the lacerate margin of 
the basal part of the lip is a unique feature in the section. 
With much pleasure I dedicate this new species to the 
collector, Mr. John Stacy, a dedicated orchidophile and 
a distinguished friend of the Orchid Herbarium of 
Oakes Ames. 
Anthosiphon pseudobulbosus (C. Schweinf.) 
Garay comb, nov. 
Basionym: Cryptocentrum pseudobulbosum C., 
Schweinf. in Bot. Mus. Leafl. Harv. Univ. 
12: 189, 1946. 
The presence of a pseudobulb and the connate sepals 
forming a tube are the characters of the genus Anthosi- 
phon. Although Mr. Hawkes reduced Anthosiphon to 
sectional status under Cryptocentrum, the reduction is 
quite unjustified. The apparent similarity in the floral 
structures found in the plants of both genera are the re- 
sult of convergent evolution rather than intrageneric 
differentiation. Asa matter of fact, Sepalosiphon of New 
Guinea is another example of convergence between 
Cryptocentrum and that genus. 
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