TABLE OF CONTENTS 
NuMBER 1 (August 18, 1959) 
The Phytomer in Relation to Floral Homologies in 
the American Maydeae 
By Watton C.GauinaT .......... = «21 
NumBeEr 2 (January 27, 1960) 
Prehistoric Bean Remains from Caves in the Ocam- 
po Region of Tamaulipas, Mexico 
By L. Kaptan ann R.S. MacNeisH . .. . . 88 
NuMBER 8 (May 19, 1960) 
On the Origin of the Orchidaceae 
By Lestige A.GaRay ........... 5% 
NuMBER 4 (June 30, 1960) 
Cytological Observations on Two Tropical Forms 
of Tripsacum 
By ¥,0. TING. 5 cow be KEE ee 
NuMBER 5 (June 30, 1960) 
Prestonia: An Amazon Narcotic or Not? 
By Ricuarp Evans ScHULTES AND Ropsert F. 
RAFFAUF ............ 2... . .109 
A Reputedly Toxic Malouetia from the Amazon 
By RicHarp Evans ScHuLres. ... . . . . 128 
NuMBER 6 (January 9, 1961) 
How Were the Glass Flowers Made? 
A Letter by Mary Lee Ware ...... . . 125 
[v ] 
