main in Pleurothallis,we must characterize Pleurothallis 
as having either two or four pollinia. 
In Restrepia, then, we find that the main generic 
character (the four pollinia) used to segregate it, is du- 
plicated in Pleurothalhs. 
One other character for segregation of Restrepia re- 
mains, the curious clavellate or antenna-like apices of the 
petals and sometimes of the dorsal sepal. This character 
is quite clear in some species, while in others it is all too 
vague. Even were this character always observable, and 
even if hints of it were not present in those species which 
were segregated as Barbosella, 1 should not be inclined 
to consider of generic rank plants exhibiting this character 
when not accompanied by other significant characters. 
It would doubtless be of value to retain the name 
Restrepia tor a section of Pleurothallis for those plants 
which exhibit clavellate sepals and petals as this character 
usually gives a rather distinctive appearance to the plants. 
PLEUROTHALLIS R. Brown section Restrepia 
(HBK.) L.0.Williams comb. nov. 
Restrepia Humboldt, Bonpland & Kunth Nov. Gen. 
& Sp. 1 (1816) 866, t. 94. 
In Mexico and Central America,—in addition to 
Pleurothallis muscifera Lindl. (Restrepia muscifera 
(Lindl. ) Reichb.f.), Plewrothallis pilosissima Schltr. (Re- 
strepia pilosissina Ames & Schweinf.) and perhaps one 
or two others, —there are the following species, formerly 
referred to Restrepia, which should be transferred to this 
section of Pleuwrothallis. 
Pleurothallis Amesiana L.O. Williams nom. nov. 
Restrepia Lankesteri Ames & Schweinfurth in Sched. 
Orch. 10 (1930) 20, non Pleurothallis Lankesteri 
Rolfe. 
[ 143 | 
