NEW OR NOTEWORTHY ORCHIDS 
oblong, about 4 mm. long, about 1.9 mm. wide at base, acute, 
l-nerved, prominently keeled on the outer surface. Dorsal 
sepal similar, about 3.5 mm. long, about 1.4 mm. wide near 
the base. Petals oblong, similar to the sepals, about 1.15 
mm. wide. Labellum sigmoid in natural position, oblong- 
lanceolate with a saccate base, about 3.6 mm. long in natural 
position, 1.8 mm. wide near the base, abruptly acute, rigidly 
attached to the short column-foot. Disc 3-nerved, with a 
pair of subpyriform calli near the middle. Column short, 
stout, terminating in a broad fleshy lobulate wing, 1.5 mm. 
long at the back. Ovary triquetrous. 
This description was made from herbarium specimens. 
Centropetalum costaricense is allied to C. Hariwegii 
(Reichb. f.) Kranzk, but it differs in having eciliate leaf- 
sheaths, and apparently much smaller leaves and flowers. 
It represents a genus new to Central America. 
Costa Rica, Province of San Jose, near Finca La Cima, 
above Los Lotes, North of El Copey, Paul C. Standley 
42600, December 21-22, 1925. 2100-2400 meters altitude. 
On oak tree. (Type in Herb. Ames No. 33211.) 
Campylocentrum longicalcaratum A. & S. sp. nov. 
Herba parvula. Caules bene foliati, foliorum vaginis omnino 
obtecti. Folia parvula, disticha, elliptica, obtusa. Inflores- 
centiae oppositifoliae, dense racemosae, folia excedentes. 
Sepala lateralia oblique oblongo-ovata. Sepalum dorsale 
ovatum, obtusum. Petala elliptico-lanceolata. Labellum 
in circuitu late ovatum, infra medium trilobatum; lobo in- 
termedio prominenti, triangulari-ovato, in apice rotundato. 
Calcar comparate longum, curvato-clavatum. 
Plant small, epiphytic, about 2-10 cm. tall. Roots fi¬ 
brous, flexuous, glabrous. Stems commonly simple, entirely 
invested by loose leaf-sheaths, generally arcuate. Leaves 
numerous, distichous, elliptic, 5-14.5 mm. long, up to 4.5 
nim. wide, obtuse, horizontally spreading, coriaceous, the 
niargins near the apex minutely denticulate. Inflorescences 
naore or less opposite the leaves, when mature about twice 
surpassing the leaves, up to 2.1 cm. long, densely racemose 
111 
