XKW OH XOTKWOHTIIY OHCHIDS 
ludinally, about 2 mm. in diameter at the base, 1 mm. thick 
at the summit, unifoliate. Leaf 3-8 cm. long, 2 mm. wide, 
linear, tapering near the base into a slender sulcate petiole, 
obtuse, minutely apiculate, only the mid-nerve prominent 
beneath. Peduncle (up to the base of the raceme) 4.5-9 cm. 
long, filiform, ascending, with a sterile glumaceous bract at 
the base of the raceme, otherwise naked below. Raceme 
4-7 cm. long, 3-4 mm. in diameter, with numerous dis- 
tichously arranged flowers. Bracts of the raceme about 
2 mm. long, 2 mm. wide, round-ovate, finely many-nerved, 
exceeding the ovary, glumaceous, with the margins some¬ 
what involute. Pedicellate ovary f mm. long, slender. 
Lateral sepals scarcely 2 mm. long, .75 mm. wide, lanceolate, 
acuminate, acute, with a conspicuous mid-nerve. Dorsal 
sepal 1.75 mm. long, similar to the laterals. Petals i.25 
mm. long, less than f mm. wide, lanceolate, acute, with the 
mid-nerve conspicuous. Labellum about 1 mm. long, about 
1 mm. wide across the lateral lobes; mid-lobe .25 mm. long, 
cuneate, rather fleshy, shallowly cmarginate, with a tri- 
angidar apicide at the tip; lateral lobes .5 mm. long, sub- 
elliptical, obtuse, erect, parallel with the column, each lobe 
with a minute, triangular-papilliform callus at the base 
near the sinus formed with the mid-lobe. Disc somewhat 
saccate or shallowly concave with an erect papilla in the 
middle. Column .5 mm. long. 
A near ally of Acoridium tenue Ames, from which it 
differs most conspicuously in the narrow leaves, smaller 
flowers and different sepals and petals. [Fig. 6.] 
Philippines, Mindanao, Agusan Province, Cabad- 
baran. Mount Urdaneta. A. D. E. Elmer 14095, October 
1912. (Type in Herb. Ames No. 13440.) 
Acoridium Serratoi Ames sp. nov. Radices fibratae, 
ramosae, glabrae. Pseudobnlbi semifusiformes, graciles, in 
sicco longitndinaliter corrugati, juniores vaginati, vaginis 
demum fibratis, monophylli. Folium anguste lanceolatum, 
obtnsum vel subacutum, breviter apiculatum, basi in pet- 
iolum gracilem contractum, nervo medio subtus prominenti. 
Pednnculus terminalis, cum racemo foliis multo longior. 
27 
