ORCHIDACEAE QUAEDAM AMERICANAE 
Roots fibrous, numerous, spreading. Pseudobulbs 
apparently congested, 4 cm. long, complanate, 2 cm. or 
more through the longest diameter, monophyllous, very 
much wrinkled when dry. Leaf about 4.4 dm. long, up to 
4.5 cm. wide, ligulate, tapering to the apex, acute, con- 
duplicate at base, coriaceous, much longer than the flower 
scape. Scapes ascending from the base of the pseudobulb, 
about 13 cm. long, clothed with about seven somewhat 
complanate tubular sheaths, 2 mm. thick. Sheaths 1.5-2.7 
cm. long, acute. Flower solitary, yellowish white with 
pink markings. Lateral sepals 2.4 cm. long, about 4 mm. 
wide, oblong, obtuse, rather fleshy, decurrent on the foot 
of the column, forming a distinct mentum, 5 mm. wide at 
base. Dorsal sepal 2.2 cm. long, 5 mm. wide, strongly 
concave, obtuse. Petals 2.2 cm. long, about 3 mm. wide, 
linear-oblong, obtuse. Labellum 1.5 cm. long, distinctly 
3-lobed in front, the basal three-fourths when spread out 
forming an elliptical lamina from the front of which the 
middle lobe projects; lateral lobes rounded, erect, 1.1 cm. long 
to the claw of the labellum; middle lobe about 3 mm. long, 
3 mm. wide, fleshy, subquadrate, obtuse. Disc traversed 
longitudinally by a narrow thickened ridge, nerves prom¬ 
inent in dried specimens. Column 7 mm. long, very fleshy. 
Allied to Maxillaria rufescens Lindl., but much larger 
vegetatively with longer scapes and a differently shaped 
labellum. 
Trinidad, B. W. L, Heights of Aripo, W. E. Broadway 
9890, January 10-26, 1922. On trees. Flowers yellowish 
white with pink markings. (Type in Herb. Ames No. 22672.) 
Ornithidium Pittieri Ames sp. nov. Rhizoma 
lignosum, elongatum, vaginis arete appressis vestitum. 
Folia ligulata, coriacea, basi conduplicata, articulata. 
Flores numerosi, congest!, axillares. Sepala similia, carnosa, 
vix patentia, ovato-lanceolata, apice incrassata, mentum 
formantia. Petala quam sepala breviora, subcarnosa, 
ovato-oblonga, obtusa. Labellum simplex, lanceolatum, 
apice valde incrassatum, basi excavato-concavum, ecal- 
losum. Golumna valida, in pedem brevem producta. 
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