ORCHIDACEAE QUAEDAM AMERICANAE 
the lateral teeth or stelidia, — one on each side in front, — 
triangular, acute. 
From Pleurothallis Brighamii S. Wats., with which it 
is closely allied, it differs in having smaller flowers, which 
are more delicate in texture and clear yellow, and in 
having the lateral sepals coherent nearly to the apex. In 
P. Brighamii each lateral sepal is conspicuously 3-nerved. 
P. pyrsodes Reichb. f. is another closely related species, 
differing from P. jocolensis in having larger flowers and in 
the lamina formed by the lateral sepals being more deeply 
bilobed. P. vilipensa Reichb. f. is also closely related, 
but different in the structure of the labellum. 
Guatemala, Department of Izabal, Jocolo, Rio Perdo- 
nalis, Harry Johnson 1048, December 25, 1920. Epiphyte 
in jungle. Flowers yellow. (Type in Herb. Ames. No. 
22745.) 
Pleurothallis Johnsonii Ames sp. nov. Caules secun- 
darii vaginis laxis elongatis vestiti, ascendentes, monophylli. 
Folia ovato-lanceolata, utrinque attenuata, coriacea, in 
petiolum subobsoletum contracta. Pedunculus singulus, 
quam folium brevior, usque supra basim pluriflorus. Brac- 
teae inflorescentiae infundibuliformes. Flores purpureo- 
maculati. Sepala lateralia vix connata, carnosa, trian- 
gularia, acuta, prope apicem carinata, glanduloso-puberula. 
Sepalum dorsale oblongo-lanceolatum. Petala carnosa, 
ciliata, glanduloso-puberula, oblonga, utrinque attenuata. 
Labellum linguiforme, carnosum, abrupte acutum, tri- 
nervium, nervis lateralibus callosis. Unguis brevis, callo 
instructus. Columna apice trilobata. 
Roots fibrous, elongated, 2 mm. thick when dry, spread¬ 
ing, villiferous. Secondary stems 3.5-5 cm. long, ascending, 
clothed with loose overlapping sheaths of which the up¬ 
permost one often encloses the base of the leaf, mono- 
phyllous. Leaf 8-10 cm. long, about 2.5 cm. wide, ovate- 
lanceolate, acute, contracted at base into a very short 
inconspicuous sulcate petiole. Peduncle terminal, with the 
raceme about 3 cm. long. Raceme 5-or more - flowered, 
erect, shorter than the leaf. Bracts of the raceme infundib- 
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