Cuba, Martinique, Guadeloupe (type of P. gwadalupen- 
sis) and Venezuela (Island of Margarita). 
Pleurothallis leucantha Schlechter in Fedde Re- 
pert. 10 (1912) 353. 
Pleurothallis Sanchot Ames in Sched. Orch. 4 (May 
1923) 26. 
Pleurothallis gonioglossa Schlechter in Fedde Repert. 
Beih. 19 (November 1928) 189. 
Judging from the type description of the Guatemalan 
Pleurothallis leucantha (amplified by an analytical draw- 
ing made under the supervision of Dr. Schlechter), that 
species differs from the Costa Rican P. Sanchoi (repre- 
sented by the type and several subsequent collections), 
by having generally longer and more acuminate leaves, 
smaller flowers, somewhat dissimilar straighter petals and 
an obtuse (not apiculate) lip. 
In the Ames Herbarium there is a Guatemalan collec- 
tion (Harry Johnson 609) taken to represent P. leucan- 
tha which came from the same region of Coban as the 
type and at about the same altitude. This collection, 
which may be called atopotype of P./eucantha, has some- 
what larger flowers than specified as typical, slightly 
curved petals and an apiculate lip which very nearly 
coincides with that of P. Sanchot. Moreover, one Costa 
Rican collection (Standley & Valerio 45983) is entirely 
typical of P. Sanchoi, except that the petals are nearly 
straight, as in typical P. leucantha. 
The concept described as Pleurothallis gonioglossa, 
which is represented by an isotype and analytical draw- 
ings in the Ames Herbarium, appears to be an exact 
vegetative counterpart of P. Sanchoi, although it has 
slightly larger flowers than the latter species. Except 
for inconsequential floral differences, this species appears 
to be inseparable from P. leucantha. 
[ 52] 
