Native Hawaiian Cotton — Stephens 
397 
at random ( leaf shape and bract form ) , or may 
be associated with the particular environment in 
which the plant is growing (pubescence and 
plant habit). 
5. In one area in Oahu two populations were 
found of undoubtedly hybrid origin ( G . bar- 
badense X 67 tomentosum ) . The underlying 
reasons for this situation are discussed. 
6. Evidence is presented for the belief rh-t 
the flowers of G. tomentosum were used by the 
ancient Hawaiian people as a source of green 
dye. 
ACKNOWLEDGMENTS 
In the course of this study I have drawn freely 
on the time, combined experience, and special 
knowledge of the following people: Dr. O. 
Degener, Waialua, Oahu; Miss Marie C. Neal 
and Mr. Alvin K. Chock, Bernice P. Bishop 
Museum; Dr. C. Lamoureux, Botany Depart- 
ment, University of Hawaii; Dr. Dale Habeck, 
Entomology Department, University of Hawaii; 
Mr. Stephen Au and Mr. A. W. Duvel, Depart- 
ment of Agriculture, Kauai; Mr. Henry Wiebke, 
Hoolehua, Molokai; Mrs. Juliette Wentworth, 
Hawaii National Park, Hawaii; Mr. L. W. Bryan, 
Kailua, Hawaii; Mr. Craig Whitesell, U.S. Forest 
Service, Hilo, Hawaii. 
I am greatly indebted also to Mr. G. Yamane 
and Mr. W. Bonsey for transport and help with 
the location of collecting sites on Lanai and 
Maui, respectively, and to Dr. C. M. Rick for 
the photographs reproduced in Figure 2. Finally 
I wish to thank my host, Dr. J. B. Smith, for 
the excellent facilities provided in the Genetics 
Department, University of Hawaii, for his con- 
tinued interest in the study, and for "stage man- 
aging” my travel in the neighbor islands. 
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