ORCHIDACEAE QUAEDAM AMERICANAE 
uliform, about 3 mm. long, 2 mm. wide across the opening, 
reaching nearly to the base of the flowers. Lateral sepals 
very fleshy, 12 mm. long, up to 4 mm. wide below the middle, 
free almost to the base, triangular, more or less glandular- 
papillose on the exterior and interior surfaces and on the 
margin, carinate near the tip. Dorsal sepal 12 mm. long, 
oblong-lanceolate, acute, with glandular excrescences on 
the outer surface, very fleshy, strongly concave at base. 
Petals about 7 mm. long, 2 mm. wide near the middle, 
oblong, tapering gradually to an obtuse tip, glandular- 
ciliate on the margin and shortly glandular on the interior 
surface, very fleshy. Labellum 5.5 mm. long, about 2.5 
mm. wide. Ungulate, fleshy, tapering gradually toward the 
apex then abruptly subacute; claw cuneate, deflexed. Disc 
3-nerved, the middle nerve extending nearly to the apex 
of the labellum, the other nerves somewhat shorter, callous- 
thickened for the greater part of their length. Claw about 
1 mm. long with a fleshy callus in the middle. Column 
3-lobed at the summit. 
In habit resembling Pleurothallis Cogniauxiana Schltr., 
but with a very different labellum and sepals. Johnson 
in his field notes describes the flowers as reddish. In dried 
material the sepals are blotched with purple, the petals 
are claret color, and on the claw of the labellum there is 
a claret-colored callus. 
Guatemala, Department of Alta Verapaz, Chama to 
Coban, Harry Johnson 901, August 15, 1920. Growing 
on rocks. 3000 feet altitude. (Type in Herb. Ames No. 
22747. Duplicate type in U. S. Nat. Herb. No. 1081162.) 
Pleurothallis samacensis Ames sp. nov. Herba 
epiphytica, dense caespitosa. Caules secundarii abbreviati, 
vaginati, monophylli. Folium marginatum, petiolatum, 
oblanceolatum, apice inconspicue bilobulatum, apiculo in- 
terjecto. Pedunculus gracilis pauciflorus. Flores purpureo- 
tincti. Sepala lateralia triangularia, caudata, margine 
glanduloso-ciliato. Sepalum dorsale lineari-triangulare, in 
caudam productum, margine glanduloso-ciliato. Petala in 
caudam producta, a basi oblongo-cuneata, aristata et den- 
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