CENTRAL AMERICAN ORCHIDS 
Secondary stems erect, about 17 cm. long, up to 5 mm. 
thick, monophyllous, vaginate, the sheaths tubular and 
elongated. Leaf 17.5 cm. long, 8 cm. or more wide, ovate, 
gradually tapering from below the middle to the pointed 
tip, coriaceous, many-nerved, the nerves conspicuous in 
dried specimens, base subcordate, contracted into a short 
petiole. Petiole more or less conduplicate, 8 mm. long. 
Flowers crowded, springing from a dense cluster of scarious 
bracts. Pedicels about 5 mm. long. Lateral sepals 11 mm. 
long, united throughout their length, forming a strongly 
concave ovate-lanceolate lamina, which is provided on the 
outside with several carinate or thickened nerves. Dorsal 
sepal about 12 mm. long, lanceolate, acute, 3-nerved, the 
median nerve prominent. Petals 11 mm. long, about 1 mm. 
wide near the middle, linear, semiterete, rounded on the 
outer side, tapering gradually to the tip, 3-nerved. La- 
bellum crescentiform when seen from above, the horns of 
the crescent touching or overlapping behind the column; 
basal half erect; apical half sharply bent downward, and 
partly coherent to the basal half, 3 mm. wide, very fleshy. 
Column 1.5 mm. long, somewhat constricted near the 
middle. 
In habit resembling Pleurothallis cardiothallis Reichb. 
f., P. acutipetala Schltr. and P. glomerata Ames, but wholly 
distinct in the structure of the flower. 
Costa Rica, Without exact locality, C. H. Lankester 
359. Sepals hyaline, the upper one with three, the lower 
with four purple stripes. Petals deep port-wine-purple. 
Anther-cap yellow. Labellum horseshoe-shaped enclosing 
the column. Lateral sepals connate, cochleate. (Type 
in Herb. Kew.) 
Pleurothallis glomerata Ames sp. nov. Herba epi- 
phytica, valida. Caules secundarii elongati, monophylli. 
Folium anguste lanceolatum, in petiolum sulcatum con- 
tractum. Flores congest! in axillis petioli. Sepala lateralia 
usque ad apicem cohaerentia, linearia. Sepalum dorsale 
lanceolatum, acuminatum, basi valde concavum. Petala 
linearia, trinervia. Labellum abbreviatum, circuitu ovatum. 
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