NumBeEr 5 (March 27, 1942) 
Orchidaceae peruvianae II] 
By CHARLES SCHWEINFURTH 
Nomenclatorial Notes in Pleurothallis 
By CHARLES SCHWEINFURTH 
NuMBER 6 (May 22, 1942) 
Recent Changes in the Names of Economic Plants 
By ALBERT F. Hine 
NuMBER 7 (July 8, 1942) 
Orchidaceae peruvianae IV 
By CHARLES SCHWEINFURTH 
NuMBER 8 (August 21, 1942) 
Western Guatemala a secondary Center of Origin 
of cultivated Maize Varieties 
By Paut C. MANGELSDORF AND JAMES W. 
CAMERON 
NuMBER 9 (October 9, 1942) 
Afriean Orchids. XII 
By V.S. SUMMERHAYES 
NuMBER 10 (October 30, 1942) 
Plantae colombianae II: Yoco: a Stimulant of 
southern Colombia 
By Ricuarp Evans ScCHULTES 
[ vi ] 
1138 
139 
141 
173 
217 
301 
