BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
CamsripGe, Massacnuserrs, Decemper 30, 1966 VoL. 21, No. 8 
NOTES ON THE SPECIES 
OF TREE DATURAS 
BY 
Menvin L. Brisro.* 
THE great variability of the arborescent Daturas, Da- 
tura sect. Brugmansia Pers., has led to the proposal of 
about two dozen specific names. In 1895, Lagerheim (9) 
ably monographed seven Ecuadorean Brugmansias, four 
of which he proposed as new. Safford’s synopsis of the 
genus in 1921 (11) treated 14 arborescent species, includ- 
ing three new concepts and two new names for older 
ones. Danert’s recent discussion (5) of sectional charac- 
ters in Datura and the possible conspecificity of several 
arborescent species includes a key to six cultivated tree 
Daturas, DeWolf (6) has followed Safford in reviewing 
five species among the North American cultivated tree 
Daturas, The newest concept, established in 1959, is 
D. vulcanicola A. S. Barclay (2). 
It is the aim of the present notes to suggest that ex- 
cessive attention has been devoted to characters of infra- 
specific variability in the recognition of the 15 species cur- 
rently accepted in Datura sect. Brugmansia. A key to 
the principal species is given, together with the more im- 
portant synonyms of each. For a complete list of specific 
* Research Fellow, Botanical Museum of Harvard University, 1965. 
Present address: H.L. Lyon Arboretum and Department of Botany, 
University of Hawaii, Honolulu, Hawaii. 
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