formis and a drawing (with floral analysis) from the type, 
this concept differs from P. dentipetala only in its rather 
larger vegetative proportions (taller stems, larger leaf 
etc.), smaller petals and somewhat smaller lip. 
However, the type of Pleurothallis dentipetala con- 
sists of two incomplete, obviously immature specimens; 
and other collections, which are apparently inseparable 
from that species, show vegetative proportions that even 
exceed those of P. stelidiformis. One such collection 
(Brenes (123) 453) has the stems up to 24 cm. long and 
the leaves up to 17.6 cm. long and as narrow as 2.8 cm. 
wide. Another collection (Brenes 11450) has leaves up 
to 13.4 em. long and 6.5 em. wide. Finally, Lankester 
1042, while vegetatively very similar to the type of P. 
dentipetala, has a slightly narrower leaf, shorter and 
broader perianth-segments, and a blunt lip. 
Morphologically the perianth-segments of these con- 
cepts seem to be precisely similar, and the petals of all 
are presumably 8-nerved despite the fact that those of P. 
stelidiformis and P.dentipetala are described as 2-nerved. 
It appears, therefore, that P. stelidiformis must join 
the formerly reduced P. Coopert in the synonymy of P. 
dentipetala. 
Pleurothallis segoviensis Reichenbach filius in 
Bonpl. 3 (1855) 2238. 
Pleurothallis Wercklei Schlechter in Fedde Repert. 
9 (1911) 213. 
Pleurothallis bifalcis Schlechter in Beihefte Bot. Cen- 
tralbl. 86, Abt. 2 (1918) 895. 
Pleurothalis Wagneri Schlechter in Fedde Repert. 
17 (June 1921) 141. 
Pleurothallis falcatiloba Ames in Proc. Biol. Soe. 
Wash. 34 (December 1921) 152. 
An analytical drawing of Pleuwrothallis Werchklei, made 
[ 96 ] 
