8-nerved. Petals lanceolate-elliptic, obtuse or rounded at 
the apex, about 12 mm. long and 6 mm. wide in the 
middle, 3-nerved with the lateral nerves branching. Lip 
adnate to the apex of the column, simple, strongly con- 
‘ave, cordate at the base, bilobed at the apex, about 13.6 
mm. long from the tip of a basal auricle to the tip of an 
apical lobule and 15 mm. wide when expanded, the three 
central nerves slightly and shortly carinate-thickened 
near the base and the central one conspicuously thick- 
ened above, the margins irregularly crenulate. Column 
short and very stout, 8 mm. long measured dorsally. 
Epidendrum concavilabium suggests FE. coriifolium 
Lindl. and 7. nitens Reichb.f., but differs from both spe- 
cies in having a dissimilar lip and broader petals. 
Costa Rica, Colinas de San Pedro de San Ramon. ‘‘14-x1-1927.”’ 
[.4.M. Brenes| (119) 1660 (Tyre in Herb. Ames No. 43877). 
Maxillaria appendiculoides C. Schweinfurth sp. 
NOV. 
Herba epiphytica. Caules elongati, sine pseudobulbis, 
foliorum vaginis imbricantibus omnino obtecti. Folia dis- 
ticha, numerosa, late patentia. Inflorescentiae breves, 
axillares, uniflorae. Flos parvus, membranaceus. Sepalum 
dorsale ovato-lanceolatum, longe acuminatum, valde con- 
cavum. Sepala lateralia lanceolata vel ovato-lanceolata, 
valde obliqua, complicato-acuminata. Petala elliptico-lin- 
earia, faleata, acuta. Labellum in cireuitu rhomboideum, 
obscure trilobatum, antice truneatum, basi cuneatum; 
discus parte inferiore callo crasso oblongo ornatus. Col- 
umna arcuata, in pedem producta. 
Plant epiphytic. Stem elongate, flexuous or arcuate, 
sparingly branched, without pseudobulbs, entirely con- 
cealed by distichous imbricating leaf-sheaths, about 5 
mm. wide or less across the sheathed stems, at rare in- 
tervals producing a few fibrous roots. Leaves articulated, 
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