margine exteriore plus minusve crenulati; lobus medius 
multo major, quadrilobulus, lobulis lateralibus semi- 
orbicularibus, lobulis anticis minoribus, obtusis; totum 
labellum igitur in lobulos sex divisum. Crista usque ad 
apicem dilatata, apice quadridentata. Columna brevis. 
Alae gynostemii dolabriformes, vix crenulatae. Flores 
pallide lutei. 
In habit similar to Oncidium pusillum Reichb.f., but 
smaller in its vegetative and floral parts, mature plants 
hardly exceeding 2.5 cm. in height. Roots filamentous, 
whitish, smooth. Leaves ensiform, about eight, equitant, 
compressed, forming a fan-shaped plant, the lowermost 
ones often horizontal, the others obliquely ascending with 
the uppermost ones perpendicular, 7-18 mm. long, 2-4 
mm. wide, obtuse or subacute, longitudinally nervose 
when dry, fleshy and smooth when fresh. Peduncle slen- 
der, one — to three — flowered, 2-8 em. long. Floral bracts 
about 2 mm. long, conduplicate, triangular, acute, much 
shorter than the pedicels, smooth. Pedicel together with 
the ovary about 5 mm. long, slender, smooth. Flowers 
vellow, 9-11 mm. long between the tip of the dorsal sepal 
and the tip of the six-lobed labellum. Lateral sepals free 
to the base, 2 mm. long, about .5 mm. wide, oblong- 
lanceolate, acute, somewhat conduplicate at the tip, cari- 
nate along the middle nerve on the outer surface. Dorsal 
sepal 3 mm. long, up to 2 mm. wide, obovate, broadest 
above the middle, tapering gradually toward the base, 
abruptly narrowed at the tip and shortly conduplicate, 
acute, lightly carinate externally along the middle nerve. 
Petals 2.5-3:mm. long, about 1.6-2mm. wide, oblong-lan- 
ceolate, shortly conduplicate at the acute tip, 1-nerved. 
Labellum about 7 mm. long, 3-lobed, the terminal lobe 
conspicuously bilobulate at the tip with a larger basal lo- 
buleon each side: lateral lobes 2mm. long, 2mm. wide, do- 
[2] 
