NEW OR NOTEWORTHY ORCHIDS 
Plant stout, rhizome stem-like. Roots fibrous, flexuous, 
glabrous. Stem entirely concealed by sheaths which waste 
into fibers in anthesis and by pseudobulbs. Cauline sheaths 
conduplicate, closely imbricated, distichous. Pseudobulbs 
numerous, strongly ancipitous in the dried specimen, com- 
planate-obovoid, about 3-4 cm. long, monophyllous, im¬ 
bricated to sub-approximate, longitudinally multistriate, 
basal part concealed by about 2 pairs of leaf-bearing sheaths 
which are distichously imbricating and conduplicate. Leaves 
locate, about 22-35 cm. long, 1.8-2.6 cm. wide, rounded at 
the apex with an obliquely bilobed tip, slightly narrowed 
and conduplicate at base, chartaceous, mid-nerve conspic¬ 
uously sulcate above and carinate beneath, margins some¬ 
what revolute in the dried plant. Flower medium-sized. 
Lateral sepals oblong, 1.9 cm. long, about 6.2 mm. wide near 
the base, rounded at the apex with a minutely mucronate 
tip, slightly oblique, many-nerved. Dorsal sepal very sim¬ 
ilar, about 6.4 mm. wide, concave. Petals spatulate-oblong, 
about 1.73 cm. long, 5 mm. wide across the upper part, 
rounded with a minutely apiculate apex, 5- to 7-nerved. 
Labellum parallel to the column and gently recurved in 
natural position with the sides of the lower portion erect, 
when expanded elliptic in outline, about 1.68 cm. long, 
slightly 3-lobed beyond the middle; basal portion cuneate- 
obovate, 10.8 mm. long, 8.4 mm. wide near the upper part; 
anterior portion suborbicular, about 7.4 mm. wide, narrower 
than the basal part. Disc with an indistinct median thick¬ 
ening at base terminating in a fleshy semiorbicular callus 
a little below the middle. Column arcuate, about 11.5 
ttim. long at the back, extended into a short indistinct 
foot. 
Maxillaria anceps, so named because of the flattened 
pseudobulbs, was described from an herbarium specimen. 
In habit it strongly recalls M. alba Lindl., but the peri¬ 
anth segments, especially the lip, are dissimilar. 
Costa Rica, Bosque Aguileo en La Palma, A. M. 
Brenes (133) 463, November 18, 1922. 1190 meters altitude. 
(Type in Herb. Ames No. 31157.) 
85 
