FEB 1964 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 10(5):l-278 



THE BOTANY OF THE GUAYANA HIGHLAND— PART V 



Bassett Maguire and John J. Wurdack 

 axd Collaborators 



introduction 



Since the preparation of Part IV of these reports on the botany of the sand- 

 stone regions of Guayana (southern Venezuela and contiguous British Guiana 

 and Brazil, and Amazonian Colombia), the following additional trips of ex- 

 ploration 1 have been made : 



1. Middle and upper Rio Orinoco, Rio Atabapo, Rio Casiquiare, Rio Guainia, 

 Rio Pacimoni and Rio Siapa, in Amazonas, Venezuela ; John J. Wurdack and 

 Lincoln Adderley, 15 May 1959-8 August 1959 ; Nos. 42656-43798. 



2. Merume Mountains (Rio Partang), Mt. Ayanganna, and the Kukui, Kako, 

 Kamarang Rivers, all affluents of the upper Mazaruni River, Pakaraima Moun- 

 tains, British Guiana, 8 June 1960-2 November 1960 ; Bassett Maguire, Stephen 

 S. Tillett, Celia K. Maguire, Carolyn L. Tillett, Rufus Boyan; Nos. 43799-43999; 

 44814-45268. 



Bassett and Celia Maguire returned to Georgetown, B. G. on June 29, leav- 

 ing Stephen and Carolyn Tillett and Rufus Boyan to carry out the larger part 

 of the expedition. Boyan withdrew from the field party on August 26. 



Collections from the Merume Mountains and Mt. Ayanganna were most re- 

 warding. These trips of reconnaissance indicate that the two mountain areas 

 should become the object of full-scale botanical exploration. 



3. Drainages of the Ireng and Kopinang (Potaro River affluent) rivers, 

 Southern Pakaraima Mountains. British Guiana, 21 August 1961-25 September 

 1961 ; Bassett Maguire, Celia K. Maguire, G. Wilson-Browne, S.J. ; Nos. 45923- 

 46264. 



We present in Part V of "The Botany of the Guayana Highland" contribu- 

 tions as follows: Bambusoideae by F. A. McClure ; Xyridaceae by Bassett Ma- 

 guire and Lyman B. Smith; Bromeliaceae by Lyman B. Smith; Piperaceae by 

 T. G. Yuncker; Lauraceae by Caroline K. Allen, of w T hich the genus Persea is 

 by Lucille Kopp ; Moronoboideae, Guttiferae by Bassett Maguire; Melastoma- 

 taceae by John J. Wurdack ; and Rubiaceae by Julian A. Steyermark. 



It may be assumed that cited specimens collected on the Guayana expeditions 

 are deposited at The New York Botanical Garden, the National Herbarium of 

 Venezuela, and the U. S. National Herbarium. 



bambusoideae 2 



The following bamboos were among the plants collected in Guayanan Vene- 

 zuela, on recent expeditions of The New York Botanical Garden. 



1 The National Science Foundation has, in large part, financed the three expeditions de- 

 scribed above, and the study of materials herein reported. 



2 By F. A. McClure, Research Associate, Department of Botany, Smithsonian Institution ; 

 studies of the Bambusoideae, aided by funds from the National Science Foundation. 



-1- 



