Species novae Acoridii generis in Philippinis insulis indigenae. 73 
Affinity with A. tenellum Nees & Meyen. Tufted grass-like epiphytes, 
with yellow fragrant flowers which turn deep reddish brown when dry. 
Pseudobulbs stem-like, fusiform, 7—8 cm long, strongly grooved when old, 
clothed with elongated, tubular, maculate, acute, closely appressed sheaths, 
the fibrous remains of which persist. Leaves grass-like, linear, promi- 
nently nerved, with a conspicuous mid-rib, at the base contracted into an 
elongated petiole, above flat, 30 cm long, 2,5—3 mm wide, acute. Pedun- 
cles filamentous, shorter than the leaves, from near the summit of which 
they appear to arise, and to the face of which they adhere lightly for a 
part of their length. Inflorescence 4,5—5 cm long, 8—10 mm through, 
bracts glumaceous, clasping the flowers, about 2 mm long. Flowers about 
2 mm apart in a rather dense, distichous raceme. Lateral sepals lanceo- 
late, acute, 3-nerved, slightly conduplicate at the apex, 4,5 mm long, 
2 mm wide. Upper sepal similar to the laterals, narrower, about 4 mm 
long. Petals lanceolate acute, 3-nerved, broadly clawed, 3 mm Jong, 
about 1,5 mm wide. Lip 3-lobed, E-shaped; lateral lobes oblong, broadened 
toward the end, with an auricular or rounded lobe at the base on the 
outer margin; middle lobe or division oblong, with a sharp mucro at the 
tip, with a thickened, transverse ridge at the base, which passes into 
two truncate calli, one at the base of each lateral lobe. In the de- 
pression at the center of the lip is a minute callus on the median nerve. 
Column less than 1 mm long. stout, similar to the column of Acoridium 
tenellum Nees € Meyen. 
Type from between Suyoc and Panai, Prov. Benguet, Luzon, alt.6500feet. 
October-November, 1905, E. D. Merrill (no. 4764); additional material from 
Mt. Data, Distr. Lepanto, Luzon, November, 1905, E. D. Merrill (no. 4594). 
In Acoridium graminifolium we have an interesting and instructive 
. transition between the filamentous-leaved À. tenellum and the broad-leaved 
A. venustulum and A. pumilum forms of the section Euacoridium. The 
fleshy flowers, which are nearly opaque, and the very complex lip of 
A. graminifolium distinguish it very clearly from its near allies. The 
character of the lip is worthy of special attention as the structure of 
the calli is more like that of the calli of A. venustulum and its allied 
species than like the calli of A. tenellum, thus forming a striking tran- 
sition between the two groups. 
3. Acoridium tenuifolium O. Ames, 1. c., p. 145. 
Pseudobulbi fusiformes; folia linearia, attenuata, acuta; pedunculi 
quam foliis breviores; sepala lateralia triangulari-lanceolata, acuta, 1- 
nervia; petala lanceolata, 1-nervia; labellum 3-lobatum, 3-callosum, lobis 
lateralibus valde elongatis, oblongis, obtusis, 1-nerviis, lobo medio minuto. 
Pseudobulbs fusiform, slender, 1,5—2,5 cm long, monophyllous. Leaves 
linear, acute, with a prominent mid-rib, 3—12 cm long, 2—4 mm wide 
contracted below into a slender petiole 1,5 cm long. Peduncle exceeded 
by the leaf, flexuose, 3,5— 5,5 cm long to the lowermost bract of the 
inflorescence, bracts 2 mm long, longer than the ovary. Flowers white, 
less than 2 mm apart, Lateral sepals triangular lanceolate, 1-nerved, 
Repertorium novarum specierum. 6 
