Pleurothallis Schiedei Reichenbach filius in Lin- 
naea 22 (1849) 826. 
Mexico: Oaxaca, District of Cuicatlin, Rio de Dormilones, Santa 
Maria de las Nieves, long. 96°29’, lat. 17°47’, altitude 1710 m., 
June 26, 1989, Schultes 709; District of Villa Alta, Cerro Zempoal- 
tepetl, south of Ayutla, long. 96°04’, lat. 16°59/, April 5, 1934, 
altitude 2400 m., Nagel 3792. 
Pleurothallis Schiedei is easily recognized by its reddish 
brown or maroon sepals which bear white, clavellate pu- 
bescence. It is a very rare orchid and is unknown out- 
side of Mexico. The Ames Herbarium has one collection 
from Chiapas and two (cited above) from Oaxaca. The 
Oaxacan collections, while from the northeastern part of 
the state, are not from neighboring localities, but are sep- 
arated by many miles and by several mountain chains. 
It is apparent that, although Pleurothallis Schiedei is a 
rare plant, it is distributed over a rather large area in 
southern Mexico. The type was collected in Mexico, but 
the precise locality is not known. 
Pleurothallis sertularioides (Sw. ) Sprengel Syst. 
Veg. 8 (1826) 721. 
Mexico: Oaxaca, District of Cuicatlin, Finca Unién Francesa, long. 
96°39’, lat. 17°55’, altitude 350-450 m., June 28, 1939, Schultes 725. 
Predominantly a West Indian species, Pleurothallis 
sertularioides has been collected in Honduras; it has 
been reported from Mexico (as Pleurothallis tenuissima 
Reichb.f.) on the basis of one previous collection. It is 
arare plant in Oaxaca and is not abundant in the locality 
where it was collected. 
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