as a contribution towards our understanding of the flora 
of Colombia. 
I wish to thank the following botanists for their collab- 
oration: Dr. José Cuatrecasas of the Chicago Museum, 
who has studied the representatives of Cecropia and 
Quararibea; Dr. Robert E. Woodson of the Missouri 
Botanical Garden, who identified the apocynaceous spe- 
cies; Padre Lorenzo Uribe of Medellin and Bogota, 
Colombia, who determined the specimens of Inga; Dr. 
B. A. Krukoff and Mr. Joseph Monachino who have 
attended to the collections of Strychnos; and Dr. F. A. 
Stafleu of Proefstation voor de Java Suikerindustrie, 
Pasoeroean, Java, who identified the representatives of 
Vochysia. 1 have also to thank Dr. Frederick J. Hermann 
of the United States Department of Agriculture for 
placing at my disposal the notes and identified plant 
specimens which he collected, some for the first time in 
Colombian territory, in the Leticia area in 1944. 
CYPERACEAE 
Fimbristylis miliacea (L.) Vahl Enum. 2 (1805) 
287. 
Collections of Mimbristylis miliacea have been made 
in British and Dutch Guiana, Venezuela and Ecuador. 
Hermann 11318 represents apparently the first collection 
to be reported from Amazonian Colombia. 
Cotomsra: Intendencia del Amazonas, Leticia, April, 1944, Fred- 
erick J. Hermann 11318. 
ARACEAE 
Pistia Stratiotes Linnaeus Sp. Pl. (1758) 963. 
This very widespread tropical American plant is known 
from almost all parts of Middle and South America. Al- 
though collections have been made from nearly every 
other district of Colombia, Hermann 11301 would seem 
[ 22 
