72 Oakes Ames. 
XXIV. Oakes Ames, Species novae Acoridii generis 
in Philippinis insulis indigenae. 
(Proc. Biol. Soc. Washington, XIX [1906], pp. 143—154.) 
8 1. Euacoridium. 
1. Acoridium Williamsii O. Ames, l. c., p. 143. 
Pseudobulbi caespitosi. fusiformes; folia linearia, setaceo-triangularia; 
pedunculi quam foliis breviores, flores distichi; sepala lateralia ovato- 
lanceolata, acuta, 3-nervia; petala rhombiformi-oblanceolata, acuta, 3-nervia ; 
labellum 3-callosum, 3-lobatum, lobis lateralibus oblongo-falcatis, obtusis, 
lobo medio oblongo-obtuso. 
Grass- or rush-like tufted plants, in habit very similar to A. tenellum. 
Nees € Meyen. Pseudobulbs approximate, clustered, fusiform, 7,5 cm 
long, tapering from a slender base. Sheaths elongated, tubular, maculate, 
acute, closely appressed to the pseudobulb. Leaf linear, triangular in 
cross section, 25 cm long, about 1 mm thick, acute. Peduncle filamentous, 
somewhat shorter than the leaf, from near the summit of which it appears. 
to arise, being for the most part enclosed by it. Inflorescence slender, 
about 7 em long, 5 mm through. Bracts glumaceous, longer than the 
ovary, 2 mm long. Flowers 2—3 mm apart, in 2 rows, greenish-white, 
forming a graceful pendulous raceme. Lateral sepals ovate-lanceolate, 
acute, 3-nerved, 3 mm long, 1,5 mm wide. Upper sepal narrower, oblong, 
3 mm long, 1 mm wide. Petals rhombic-oblanceolate, acute, 3-nerved, 
about 3 mm long, 1 mm wide. Lip 3-lobed or trifid; lateral divisions 
largest, oblong-faleate, obtuse, with a minute callus at the base of each 
near the sinus formed with the oblong, obtuse, middle lobe, which is 1 mm 
long. Column much like that of A. tenellum Nees & Meyen. Fruit not seen. 
Type in Herb. New York Botanical Garden, from Trinidad, Prov. Ben- 
guet, northern Luzon, September 28, 1904 (growing on rock), R. S. 
Williams (no. 1939). 
An interesting addition to the grass-leaved division of Æuacoridium, 
of which, heretofere, A. tenellum and A. sphacelatum were the only known 
representatives. From both of these species it is at once distinguished 
by its strieter habit, thicker, triangular leaves, larger flowers, and very 
different lip. The flowers at the summit of the raceme begin to expand first, a 
character which does not hold in A. tenellum, A. sphacelatum or A. gramini- 
foliwn, in all of which species the lowermost flowers are the first to bloom. 
2. Acoridium graminifolium O. Ames, l. c., p. 144. 
Pseudobulbi fusiformes; folia linearia, acuta; peduneuli quam foliis 
breviores; flores distichi; sepala lateralia lanceolata, acuta, 3-nervia, ad 
apicem paulo conduplicata; petala lanceolata, acuta, 3-nervia; labellum 
3-callosum, 3-lobatum, lobis lateralibus oblongis, ad apicem latioribus, ad. 
basim auriculatis, lobo medio oblongo, mucronato. 
