NEW OR NOTEWORTHY ORCHIDS 
Secondary stems probably caespitose, with a large 
sheath near the middle, up to 83 cm. long, exceeding 6 mm. 
in diameter, when dry longitudinally sulcate, monophyllous. 
Sheath 10.5 cm. long, dilated, acute, scarious. Leaf 31.5 cm. 
long, 20.5 cm. wide below the middle, orbicular-ovate, acu¬ 
minate, acute, cordate at the base, nervose, subcoriaceous 
when dry. Peduncles fasciculate, about seven, emerging 
from a complanate spathaceous bract near the axil of the 
leaf, with the raceme up to 21 cm. long, flexuose. Bracts of 
the raceme subinfundibuliform, translucent, about 2.5 mm. 
long, much shorter than the pedicel, about 1 mm. wide at the 
mouth. Pedicel with the ovary about 7 mm. long, very 
slender, ascending. Flowers whitish in dried specimens, 
dotted with dark purple. Lateral sepals 3.5 mm. long, 
united to the apex, forming a deeply concave lamina which 
is suborbicular when spread out. Dorsal sepal 2.5-3 mm. 
long, 1 mm. or more wide, oblong-ovate, acute, 3-nerved, the 
lateral nerves closed. Petals nearly 2 mm. long, hardly 
1 mm. wide, spatulate, 3-nerved, much thickened above 
the middle. Labellum 1 mm. long, 3 mm. wide, narrowly 
transverse-elliptical when spread out, apiculate, sessile; when 
in natural position it is conduplicate and is semi-elliptical or 
triangular-ovate when seen from the side. Disc with a fleshy, 
obliquely situated, protuberant callus on each side. Column 
1 mm. long, fleshy. Pollinia two, elongated, pyriform. 
Pleurothallis praegrandis is one of the largest species of 
the genus known to occur in the Central American flora. It 
belongs to the same alliance as P. galeata Lindl., from which 
it differs conspicuously in having thickened, spatulate petals 
and a different labellum. 
Panama, Cana and vicinity. R. S. Williams 973, April 
17 to June 8, 1908. On trees. 6000 feet altitude. (Type in 
N. Y. Bot. Card.) 
Pleurothallis scandens Ames sp. nov. Caules prima- 
rii valde elongati, scandentes, vaginis minute verruculosis 
arete appressis vestiti; caules secundarii ad nodos caulium 
primariorum plus minusve tres, graciles, infra medium 
vaginis hispidulis arete appressis vestiti, superne vaginis 
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