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BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
17, 1946 
CampripGr, Massacnuserts, APRIL 
VoL. 12, No. 7 
NEW AND INTERESTING 
MEXICAN ORCHIDS 
BY 
Louris O. WILLIAMS 
In 1938 I went to Mexico to see the orchid herbarium 
of Erik Oestlund and if possible to secure it as an addi- 
tion to the Ames Herbarium at Harvard University. 
The Oestlund heirs gave the collection to the Ames Her- 
barium and it was forwarded to Cambridge. 
The collection was carefully studied and has now been 
incorporated with the Ames Herbarium. 
The Oestlund collections were made principally by 
Otto Nagel, Juan Gonzalez and Mr. Oestlund, with the 
occasional help of others. The herbarium is by far the 
largest single collection of orchids ever made in Mexico, 
consisting of about four thousand numbers, many of them 
in duplicate. The serial numbers run from 500 to 8087. 
A large portion of the numbers in the series, however, 
are not represented by specimens. 
Papers describing novelties from the Oestlund herbar- 
ium have appeared occasionally in this journal as the 
study and naming of the collection progressed. This 
paper describes the last of such novelties, as well as some 
others that were discovered in other collections during 
the time that the Oestlund collection was being studied. 
A complete set of the Oestlund specimens, as well as 
the types of all of the novelties described from it, is to 
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