XKW OK NOTEWORTHY ORCHIDS 
Discus leviter concavus, prope basim lobi lateralis utriuscjue 
et in depressione disci callus vel papilla. Columna generis. 
Epiphytic caespitose herb. Roots much branched, 
spreading, smooth. Pseudobulbs 1.5 cm. long, 2 mm. in 
diameter at the base, 1 mm. thick at the summit, yellowish 
when dry, wrinkled, when young covered with closely op¬ 
pressed sheaths (when mature surrounded by the fibrous 
remains of the sheaths), monophyllous. Leaf 3.5-8 cm. 
long, 5-6 mm. wide near the middle, oblong, acute, ob¬ 
scurely apiculate, with the mid-nerve conspicuous beneath. 
Petiole about 1 cm. long, slender. Peduncle including the 
rachis of the raceme up to 10 cm. long, naked below the 
raceme, very slender. Raceme 4-5 cm. long, about 5 mm. 
in diameter, with the white flowers distichously arranged. 
Bracts of the raceme 2 mm. long, round-ovate, acute, longi¬ 
tudinally nerved, exceeding the ovary. Pedicel with the 
ovary about 1.5 mm. long. Lateral sepals 2 mm. long, 1 mm. 
wide below the middle, lanceolate, acute, mid-nerve evident. 
Dorsal sepal 2 mm. long, 1 mm. wide below the middle, 
lanceolate, acute. Petals 1.75 mm. long, 1 mm. wide, 
broadly ovate, or elliptic, acute, with the mid-nerve evident. 
Labellum 3-lobed, 1 mm. long, 1.75 mm. wide across the 
lateral lobes when spread out; lateral lobes falcate, obtuse, 
erect, each with a papilliform callus at the base near the 
sinus formed w'ith the mid-lobe; middle lobe subquadrate, 
apiculate or trilobulate in front with the middle lol)ule 
triangular acute. Disc lightly concave with a small pa¬ 
pilliform callus in the center. Column ebrachiate. 
Closely allied with A'coridium microchilum (Schltr.) 
Ames and A. lenue Ames, but separable from them by the 
petals being broadly ovate or elliptical. In contour the 
labellum is very similar to that of A. microchilum (cf. Ames 
Orch. 2 (1908) t. 21, fig. 2). [Fig. 6'.] 
Philippines, Luzon, Rizal Province, Mount Lumutan, 
M. Ramos, Bureau of Science. 42338, April 21, 1923. On tree 
in mossy forest. 4000 feet altitude. (Type in Herb. Ames 
No. 26729.) 
22 
