80 Oakes Ames. 
species of the section Euacoridium by the scattered ocelli on the sepals 
and petals. 
14. Acoridium Merrilli O. Ames, |. c., p. 151. 
Pseudobulbi fusiformes; folia oblongo-lanceolata, acuta; sepala lateralia 
lineari-lanceolata, acuta; petala oblongo-lanceolata, quam sepalis ¡breviora, 
margine minute denticulata; labellum 3-lobatum, lobis lateralibus rotun- 
datis, quam lobo medio emarginato minoribus. 
Near Dendrochilum exalata J. J. Smith. Pseudobulbs clustered, mono- 
phyllous, 2—-2,5 cm long, fusiform, grooved and furrowed when dry. 
sheaths 2,5—7 cm long, maculate, acute. Leaf oblong-lanceolate, acu- 
minate, acute, 11—14 cm long, about 2 cm wide. Petiole 2,5—3,5 cm 
long. The prominently nerved lamina of the leaf, which becomes very 
dark in color when dried, passes abruptly into the petiole. Peduncle very 
slender, 0,5 mm in diameter, naked, without imbricating bracts at the 
summit below the inflorescence, equalling the leaf or slightly shorter. 
Inflorescence a loose, graceful, comparatively large-flowered raceme, 1 dm 
long, 1,5—2 em through. Floral bracts linear-lanceolate, acute, about 
3 times longer than the ovary and pedicel, 4—7 mm long, the slender 
awn-like apical portion up-curved. Flowers 4 mm apart. Lateral sepals. 
linear-lanceolate, acuminate, acute, carinate, 3-nerved, 9 mm long, 2 mm 
wide, spreading; upper sepal similar to the lateral ones, of equal length 
with them. Petals oblong-lanceolate, microscopically and irregularly too- 
thed along the margin, acute, 3-nerved, 6 mm long. Labellum with 3. 
thickened nerves, ecallose, 5 mm long, 3-lobed, the apical lobe much the 
largest, 3 mm long and broad, rounded, blunt and emarginate, lateral 
lobes nearly half round, minutely toothed, obliquely erect. Column rather 
stout, 2,5 mm long, apex minutely crenulate, about midway in front a 
membranaceous protuberance. Fruit not seen. 
From Mt. Data, Distr. Lepanto, Luzon, November, 1905, E. D. Mer- 
rill (no. 4585 [type] and 4858). 
This very distinct species, which shows clearly its affinity with Platy- 
clinis King Hook f. (Icones, Pl. 2015) and with Dendrochilum exalatum 
J. J. Smith, from which it is readily distinguished by its very different 
labellum, is represented by two collections made by Elmer D. Merrill on 
Mt. Data, on the island of Luzon. It is a most interesting addition to 
the group standing between Platyclinis and Euacoridium, having the habit 
of the former and the gynostemium of the latter. 
82. Platyelinis. 
15. Acoridium longilabre O. Ames, l. c., p. 152. 
Pseudobulbi oblongo-fusiformes; folia lineari-oblanceolata, obtusa, mu- 
cronata, valde 3-nervia; perianthii membra inter se fere aequalia, lineari- 
oblonga, obtusa vel sub-acuta; labellum integrum, quam sepalis petalisque 
latius, ad basim 2-lamellatum. 
Pseudobulbs 13—33 mm long, oblong-fusiform, clothed by nigro- 
punctate sheaths. Leaves linear-oblanceolate, obtuse, mucronate, about 
