Number 5 (May 1, 1963) 
Spread of Kight-rowed Maize from the Prehistoric 
Southwest 
By Watton C. Gauinat AND JAMEs H. 
GUNNERSON .............. 114 
Number 6 (November 22, 1963) 
Notes on the Present Status of Ololiuhqui and the 
other Hallucinogens of Mexico 
By R. Gorpon Wasson . . . . . 2... . «161 
The Active Principles of the Seeds of Rivea 
corymbosa and Ipomoea violacea 
By AvBpert HormMann.......... . 194 
NuMBER 7 (November 29, 1963) 
A New Gossypium from the Cape Verde Islands 
By Duncan CLEMENT AND Lyte L. Puinuies 213 
Plantae Colombianae XVI. Saurauiae Provinciae 
Putumayonis Species Nova 
By Ricuarp Evans Scuutres . . . . . . .) 22] 
NUMBER 8 (May 8, 1964) 
Present Status of Botanical Studies of Ambers 
By Jean H. LANGENHEIM . . . . . . . . 225 
NuMBER 9 (June 80, 1964) 
Tripsacum as a Possible Amphidiploid of Wild 
Maize and Manisuris 
By Watron C. Gauinat, Rasu S.K. 
CHAGANTI AND Floyp D. Hacer. . . . . 289 
[ vi ] 
