Species novae Acoridii generis in Philippinis insulis indigenae. 75 
quam foliis longiores; sepala lateralia lanceolata, acuta, 1-nervia; petala 
lanceolata, acuta, 1-nervia; labellum 3-lobatum, 2-callosum, lobis laterali- 
bus oblongo-falcatis, obtusis, lobo medio retuso-mucronato. 
Affinities with 4. tenue. Whole plant not exceeding 8 cm in height. 
Pseudobulbs monophyllous, 4—10 mm long, clothed with tubular acute 
sheaths. Leaves linear-oblong, obtuse, truncate, prominently 3-nerved, 
2—3,5 cm long, 2-2,5 mm wide. Peduncles very slender, slightly longer 
than the leaves, 3—4 cm long. Raceme graceful, 1,5 —2 cm long, about 
3 mm through. Bracts acute, longer than the ovary, 1,5 mm Jong. Flowers 
when spread out 4 mm across. Lateral sepals lanceolate, acute, 1-nerved, 
2,5 mm long, about 1 mm wide. Upper sepal similar to the laterals, 
about 3 mm long. Petals lanceolate, acute, 2 mm long, 1-nerved. La- 
bellum 1,25 mm wide, 3-lobed; lateral lobes oblong-falcate, rounded at 
the apex, erect, clasping the column; middle lobe broader than long, the 
apex retuse, mucronate. From the inner basal margin of each lateral 
lobe a thickening, callus-like in its nature, extends to the middle of the 
middle-lobe, where the two thickenings become confluent. Column minute, 
with a protuberance in front. 
From Lamao River, Mt. Mariveles, Prov. Bataan, Luzon, October, 
1903, Elmer D. Merrill (no. 3217b). 
Acoridium parvulum, which is the smallest member of the genus known 
to come from the Philippine Islands, resembles closely 4. tenue, though 
this is a larger species, with longer leaves, more slender, longer pseudo- 
bulbs, longer racemes and narrower, 3-nerved sepals. The leaves of 
A, parvulum do not taper at the base so abruptly as those of A. tenue. No. 3217 
of Merrill's collections consists of a mixture of A. parvulum and A. tenue. 
6. Acoridium venustulum O. Ames, l. c., p. 147. 
Pseudobulbi fusiformes; folia lineari-oblanceolata; sepala lateralia late 
ovata, acuta, 1-nervia; sepalum superius lanceolatum, acutum; petala fal- 
cata, lineari-lanceolata, acuta; labellum 3-lobatum, 3-callosum, lobis late- 
ralibus ovato-falcatis, obtusis, lobo medio emarginato-mucronato. 
Pseudobulbs fusiform, 2 em long, monophyllous; leaves linear- 
oblanceolate, 6—7,5 cm long, 5—8 mm wide, rounded at the tip, acute. 
Petiole 5—10 mm long, slender. Peduncle 5—7 cm long, very slender, 
flexuose, with several imbricating bracts below the inflorescence. In- 
florescence 5—7 em long, about 5 mm through, densely many-flowered. 
Pedicels about 2 mm apart. Bracts much longer than the ovary, ovate 
from a broad base, glumaceous, obtuse, 2,5 mm long. Flowers small, 
dull yellow, in two rows, forming a graceful drooping raceme. Lateral 
sepals broadly ovate, acute, 1-nerved, 3 mm long, 1,5 mm broad. Upper 
sepal lanceolate, acute, considerably narrower than the laterals, similar to 
the 1-nerved, somewhat falcate, linear-lanceolate, acute petals, which are 
3 mm long. Lip minute, somewhat saccate, 3-lobed, from base to tip of 
midlobe 1 mm long, about 2 mm wide; lateral lobes broadly ovate-falcate, 
obtuse with a thickened, partly free callus at the base of each: middle 
lobe deeply emarginate, mucronate; sac or depression oblong, with a 
GF 
