TROPICAL AMERICAN ORCHIDS 
lanceolata. Sepalum dorsale peranguste lanceolatum, parte 
superiore filiformi, apice crasso dilatato. Petala multo 
minora. Labellum circuitu lanceolatum, parte inferiore sub- 
orbiculari, utrinque lobulo triangulari ornata; parte ante- 
riore ligulata, retusa et eroso-dentata. Columna gracilis. 
Plant slender, 8.2-12 cm. tall to the tip of the erect leaf. 
Roots fibrous, flexuous, very slender, inconspicuously pul¬ 
verulent. Stems caespitose, monophyllous, 4.4-6 cm. long, 
entirely concealed by five to seven imbricating loose tubular 
scarious sheaths or the fibrous remains of sheaths. Leaf 
narrowly elliptic, shortly petioled; lamina 3.9-4.8 cm. long, 
1.15-1.8 cm. wide across the middle, acute and minutely 
bilobed and apiculate at the apex, cuneate at the base, 
coriaceous, the mid-nerve conspicuous. Peduncle filiform, 
3.4-4.4 cm. long, shorter than the petioled leaf. Pedicel 
(including the ovary) 5-8 mm. long, on its lower half atubular 
bract which is mucronate at the tip, below the jointed ovary 
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