TROPICAL AMERICAN ORCHIDS 
the lateral lobes, quadrate below the middle, narrowed 
toward the apex into an acute thickened tip. Disc shortly 
bicarinate near the apex of the adherent column, with the 
keels 2 mm. long and strongly flattened laterally; between 
the keels the central nerve of the disc is much thickened, and 
as a fleshy ridge extends to the base of the middle lobe. 
Colnmn 1.3 cm. long, dilated upward, with the clinandrium 
finely fimbriate. 
Epidendrum Storkii is allied to E. difforme .Tacq., from 
which it differs in the outline of the labelliim. In the struc¬ 
ture of the labelliim it shows close affinity to E. pudicum 
Ames and E. simulacrum Ames, but is clearly distinguished 
from them by the much larger flowers. 
Costa Rica, Mountains south of Cartago, //. E. 
Stork 460, June 20, 1923. (Type in Herb. Ames No. 27294): 
Vicinity of La Palma, on the road to La Hondura, IV. R. 
Maxon & Alfred D. Harvey 8116, July 17-18, 1923. Flower 
greenish. On mossy tree trunk. 1500-1700 meters altitude. 
Maxillaria Lankesteri Ames sp. nov. Herba epiphyt- 
ica. Caules elongati, pseudobiilbis inter se satis distanti- 
biis instructi. Folia elliptico-oblonga, apice bilobata. Pars 
caulis tlorifera bracteis arete imbricantibus obtecta. Pe- 
dunculus uniOorus, bibracteatus. Sepala lateralia oblongo- 
lanceolata, acuta, quinquenervia. Sepalum dorsale simile. 
Petala oblongo-lanceolata, obtusa, quadrinervia. Labellum 
trilobatum; lobis lateralibus minutis, semiovatis; lobo 
medio elliptico, emarginato, margine valde dellexo, prope 
basim callo transverso instriicto. Columna arcuata, in 
pedem producta. 
Epiphytic herb with slender ascending or drooping 
stems which bear slender pseudobulbs at intervals and are 
invested between the pseudobulbs with closely imbricating 
bracts from among which the flowers are produced. Stems, — 
with a few distichous leaves at the growing point, — slender, 
about 3 mm. thick, arising from a mass of whitish fibrous 
roots, concealed at base by the persistent sheaths of fallen 
leaves, sometimes subtended by the remains of pseudobulbs. 
Pseudobulbs 2.5-3 cm. long, 3-4 mm. thick, monophyllous 
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