TROPICAL AMERICAN ORCHIDS 
vate-oblong, about 6.9 mm. long, 3 mm. wide across the 
slightly broader upper part, complicate-mucronate, con¬ 
cave, 7-nerved with two lateral indistinct nerves. Pet¬ 
als linear, 6.5 mm. long, 1.5 mm. wide, acute or obtuse, 
3-nerved. Labellum deeply saccate in natural position; lam¬ 
ina when expanded broadly flabellate, about 6-7 mm. long, 
more than 7 mm. wide across the forward portion, apex 
lightly but distinctly 3-lobed, anterior margins (except the 
centre of the middle lobe) lacerate-erose; lateral lobes 
broadly semiorbicular; middle lobe similar in shape but 
much smaller, thickened and entire at the apex; saccate 
base fdled with a pair of approximate ovoid-pyriform com- 
planate calli; in front of these calli there is a pair of trans¬ 
verse low triangular keels. Column straight, slender, 
broadly winged above, about 4.5 mm. long dorsally, longer 
in front. Pollinia ovoid-pyriform with a groove ending in a 
deep pit on one side. 
Costa Rica, from San Ramon to Esparta, A. M. 
Brenes 14281, May 14, 1901. 1000—1200 metres altitude. 
(U. S. Nat. Herb. No. 579491.) 
Panama, San Juan, C. W. Powell 3267 {Hod. Powell 
97), April 1923. Epiphyte at sea level. (Type in Herb. Ames 
No. 28126.): Canal Zone, around Culebra, H. Pittier 3443, 
May 6, 1911. 50-159 metres altitude: Province of Colon, 
near Porto Bello, William R. Maxon 5808, May 27, 1912. 
On tree trunks, near sea level. 
Sobralia mucronata A. & 5. sp. nov. Herba alta ut 
videtur. Caulis teres, vaginis tubulatis pro parte inclusus, 
parte superiore paucifoliata. Folia lanceolato-elliptica, acu¬ 
minata, basi cuneata, plicata. Flos pro genere parvus. Sepala 
lateralia elliptico-oblonga, conspicue mucronata. Sepalum 
dorsale lineari-oblongum, conspicue mucronatum. Petala ob- 
lanceolato-oblonga, mucronata. Labellum quadrato-oblon- 
gum, carinis nonnullis undulatis percursum. Columna gra¬ 
cilis, apice trilobata. 
Plant apparently tall (lower portion missing). Stem 
terete, over 31.7 cm. tall, 2.5-3 mm. in diameter, distichously 
2-3-leaved near the summit, partially concealed by tightly 
54 
