for sharing with us his notes on Latuwa and to Dr. Benkt 
Sparre (Museum of Natural History, Stockholm) for 
permitting us to publish part of his diary. We appre- 
ciate the help of Hans Klempau (Universidad Austral) 
who provided the photographs of Latwa. Drs. Antonio 
and Carmen Krapovickas (Universidad del Nordeste, 
Corrientes, Argentina) kindly lent their excellent labora- 
tory facilities for chromosome studies. We are thankful 
to Professors Richard Evans Schultes and Bo Holmstedt 
for their encouragement and support in conducting this 
work. The following herbaria furnished specimens and 
information: Gray Herbarium, Cambridge, Massachu- 
setts (GH): U.S. National Museum, Washington, D.C. 
(US): Royal Botanic Gardens, Kew, England (I): 
British Museum, London (BM): Systematisch-Geobo- 
tanisches Institut, GOottingen, Germany (GOET); Facul- 
tad de Quimica y Farmacia, Santiago, Chile (FARM): 
Universidad Austral, Valdivia, Chile (VALJ)). 
The research reported in this paper was supported in 
part (Gyllenhaal and Lindgren) by the National Insti- 
tute of Mental Health (Grant 4M H 12007), the National 
Institute of General Medical Sciences (GM 13978), the 
Swedish Medical Research Council (B 70-40x-6229-038 
and B 70-40x-199-07), Riksbankens Jubileumstond, 
Stiftelsen Gustaf och Tyra Svenssons Minne and by 
Knut och Alice Wallenbergs Stiftelse: and in part 
(Plowman) by the National Institutes of Health Train- 
ing Grant (2 'TO1 GM 00086-13), the National Institute 
of Health (ILM-GM 00071-01, Richard Evans Schultes, 
Principal Investigator), and by the National Science 
Foundation Evolutionary Biology ‘Training Grant (GB 
7346, Reed Rollins, Principal Investigator, Harvard 
University). Mr. Joshua Clark made the line drawing 
of Latua through funds provided by the Milton Fund. 
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