TABLE OF CONTENTS 
NuMBER 1 (June 14, 1945) 
PAGE 
The Genus Hevea in Colombia 
By Ricuarp Evans ScHULTES ........ 1 
NuMBER 2 (August 15, 1945) 
The Origin and Nature of the Ear of Maize 
By Paut C. MANGELSDORF. ........ ..88 
NuMBER 8 (October 23, 1945) 
African Orchids XVI 
By V.S. SUMMERHAYFS .......... .89 
NuMBER 4 (January 25, 1946) 
Plantae austro-americanae III 
By Ricuarp Evans ScHULTES ........ 117 
NuMBER 5 (February 8, 1946) 
Orchidaceae novae guineae 
By Louis O:; WintraMs* = 2 2. 4 « 2 49 
Notes on the Family Corsiaceae 
By Louis O. WinuiamMs .......... #179 
NuMBER 6 (March 27, 1946) 
Orchidaceae peruvianae VI 
By CHARLES SCHWEINFURTH ...... . .. 185 
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