- 
Species novae Acoridii generis in Philippinis insulis indigenae. 77 
Lateral sepals 6 mm long, 3 mm wide, lanceolate, acute, 3-nerved. Upper 
sepal elliptic-oblong, 6 mm long, 3 mm wide. Petals obovate, 5,5 mm 
long, 4 mm wide, somewhat erose on the margin near the tip, 3-nerved, 
the lateral nerves branched. Lip 4 mm wide, 3-lobed. Lateral lobes 
2,5 mm long, apex acute, reflexed. Middle lobe retuse-mucronate, acute; 
margin on each side of the mucro thickened into callus-like protuberances, 
from each of which a conspicuous vein runs back to the tuberculate or 
emarginate calli situated one on each side of the dise near the base. 
Column stout, apex behind the anther crenulate. 
From Mt. Data, Distr. Lepanto, Luzon, alt. 7000 ft., epiphyte, Oc- 
tober 20, 1905, Elmer D. Merrill (no. 4482). 
Acoridium anfractum is most nearly allied to A. pumilum Rolfe, from 
which it differs in the outline and calli of the lip, in the venation of 
the petals, and in the very conspicuously zig-zag rachis of the larger- 
flowered raceme. 
9. Acoridium recurvum O. Ames, l. c., p. 148. 
Pseudobulbi recurvati, fusiformes; folia lineari-oblonga, acuminata, 
apiculata; flores distichi; sepala ovata, obtusa, 3-nervia; sepalum dorsale 
elliptico-oblongum, obtusum; petala obovato-suborbiculata, 3-nervia; la- 
bellum 3-callosum, 3-lobatum, lobis lateralibus falcatis, obtusis, lobo medio 
quadrato, ad angulos rotundato, at apicem dente sive mucrone instructo. 
Epiphytes apparently pendulous, with elongated fusiform recurved 
pseudobulbs. Pseudobulbs 3--4 cm long, about 3 mm in diameter, clothed 
by nigro-punctate, loose sheaths. Leaves linear-oblong, acuminate, apic- 
ulate, many-nerved, 10—12 cm long, 10—14 mm wide, Petioles slender, 
18 mm long. Peduncles shorter than the leaves. Racemes 2,5—4 cm 
long, rather toosely flowered. Bracts 3 mm long, longer than the ovary. 
Flowers 10—13 or more, 3 mm apart, rather fleshy, 6 mm across when 
spread out. Lateral sepals ovate, obtuse, 3-nerved, 4,5 mm long. Upper 
sepal elliptic-oblong, 4 mm long. Petals 4 mm long, 2,5 mm wide, ob- 
ovate, suborbicular, 3-nerved. Lip 3-lobed, from base to tip of mid-lobe 
1—1,5 mm long; lateral lobes faleate, obtuse; middle lobe quadrate, 
rounded at the angles, with a tooth or mucro at the apex. At the base 
of each lateral lobe is a thickened callus-like plate, and near the middle 
of the lip a small tubercle. 
From Mt. Data, Distr. Lepanto, Luzon, November, 1905, Elmer D. 
Merrill (no. 4584). 
Acoridium recurvum is most nearly allied to A. pumilum Rolfe, although 
much larger in foliage and quite different from it in habit. The flowers 
are fleshy, nearly opaque, and red-brown when dry. The recurved pseudo- 
bulbs, which arise from a creeping branched rhizome, and the densely 
spotted sheaths, which clothe the immature pseudobulb and conceal the 
petiole and leaf-base, are characters which distinguish this species clearly 
from all other species of Acoridium thus far discovered in the Philippine Islands. 
10. Acoridium philippinense O. Ames, l. c., p. 149. 
Pseudobulbi pyriformes; folia oblongo-lanceolata, 5-nervia: sepala 
