TROPICAL AMERICAN ORCHIDS 
Flowers small for the section. Pedicellate ovaries 1.6-3 
cm. long, finely short-pubescent; ovaries 4-angled. Sepals 
densely and inconspicuously short-pubescent on the outer 
surface. Lateral sepals lanceolate-obovate, very oblique, 
about 7.1 mm. long, 3 mm. wide across the expanded upper 
part, abruptly complicate-mucronate, with a high conspicu¬ 
ous dorsal keel, obliquely inserted at the base, concave, 
4-nerved. Dorsal sepal oblong-obovate, slightly shorter and 
narrower than the laterals, obtuse or acutish, provided with 
a low keel, 3-nerved, concave. Petals cuneate-spatulate, 6.1 
mm. long, about 2 mm. wide above, acute, 3-nerved, the 
upper margins irregularly erose-denticulate. Labellum ad- 
nate to the column to its apex, sharply 3-lobed; lamina 
reniform in outline, about 1.1 cm. wide, 3 mm. long to the 
deeply retuse centre of the middle lobe, bicallose at base 
with an intermediate keel which is broad at its base, grad¬ 
ually narrowed and extended nearly to the apex of the middle 
lobe; lateral lobes spreading, dolabriform, irregularly den¬ 
tate at the broadly rounded apex; middle lobe smaller, 
cuneate-quadrate, bilobed, apiculate, the lobules irregularly 
lacerate-dentate at the apex. Column stout, dilated above, 
about 4.2 mm. long, characteristic of the genus; clinandrium 
entire. 
Epidendrum dolabrilobum is related to E. radicans 
Lindl., but the flowers are much smaller. The leaves are like 
those of E. imatophyllum Lindl. 
Costa Rica, Las Concavas, C. II. Lankester 769, 
February 27, 1924. “A common sp. of the region, growing 
chiefly on Inga, strongly myrmecophilous, bulbs swollen at 
base—flowers cream fading yellow.” (Type in Herb. Ames 
No. 28295.) 
Epidendrum erosum A. & S. sp. nov. Pars herbae 
inferior non visa. Caulis maxima pro parte vaginis tubula- 
tis obtectus. Folia disticha, elliptico-lanceolata, submem- 
branacea. Inflorescentiae nutantes, breviter pedunculatae. 
Flores crassi. Sepala lateralia anguste obovata, acuta. Se- 
palum dorsale simile, cuneatum, angustius. Petala anguste 
cuneato-spathulata, minute erosa. Labellum columnae longe 
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