NEW OR NOTEWORTHY ORCHIDS 
permost one 5 cm. long, complanate, obtuse, about 1 cm. 
wide at the summit, 3 mm. wide at the base, partly concealing 
the peduncle. Leaf distinctly petiolate; petiole about 2 cm. 
long, sulcate; lamina oblong-elliptic, 8.5-9 cm. long, 2-2.5 cm. 
wide, bilobulate and apiculate at the apex, coriaceous. Pe¬ 
duncle including the raceme up to 18.5 cm. long, solitary, 
arising 2 cm. below the insertion of the petiole, clothed at 
base with two ancipitous imbricating sheaths which are 
about 7 mm. long, paucibracteate below the raceme, slender. 
Raceme up to 11 cm. long, bearing about sixteen brown- 
purple flowers. Floral bracts infundibuliform, about 3 mm. 
long, eqnaling the pedicellate ovary. Lateral sepals united 
to the apex forming a suborbicular lamina which is 8 mm. 
long, 7.5 mm. wide, minutely glandular-pubescent within, 
9-nerved, the nerves more or less prominent on the inner 
surface. Dorsal sepal about 9 mm. long, 7 mm. wide, 
ovate, obtuse, 9-nerved, coalescent at base with the lateral 
sepals, minutely glandular-pubescent within. Petals about 
2 mm. long, 2 mm. wide, very fleshy, rhombic, subobtuse, 
anterior and posterior angles joined by a fleshy ridge. Label- 
lum very fleshy, 1 mm. long, 2 mm. wide, with a raised 
transverse ridge, triangular in median longitudinal section. 
Column shorter than the petals, dilated upwards. 
In the size of the flowers Stelis Lankesteri suggests S. 
leucopogon Reichb. f., from which it differs conspicuously 
in having the lateral sepals wholly coherent to form a subor¬ 
bicular lamina. In the size of the flowers it is the largest 
species of the genus so far known to be a native of Central 
America, and is one of the largest flowered species of the 
genus. 
Costa Rica, La Florida, C. H. Lankester 365. (Blooming 
at Las Concavas October-November 1922.) In hot forest. 
Flower vinaceous brown. 150 meters altitude. (Type in 
Herb. Ames No. 22847.) 
J 
Pleurothallis cucullata Ames sp. nov. Caules secunda- 
rii elongati, graciles, vaginati, monophylli. Folium elliptico- 
oblongum, utrinque attenuatum, epetiolatum, valde coria- 
ceum, quam pedunculus cum racemo brevius. Pedunculus 
5 
