30 University of California Puhlications in Botany [Vol. 5 



ascending to nearly horizontal as anthesis proceeds. While they 

 are open in the daytime as well as at night their perfume is 

 faint until after nightfall. The ripened capsules are erect. The 

 leaves are elliptical to spatulate-oblong with a broad clasping 

 and slightly decurrent base. They are coarsely rugose. 



LIST OF PAPEES EEFEERED TO 



Agakdh, C. a. 



1819. Nagra Ord om Tobaks Odligens Forbattring. 

 Anastasia, G. Emilio 



1906. Le Varieta Tiijiche della Nicotiana Tabacum L. 

 Andr6, Ed. 



1888. Eevue Horticole, p. 511. 

 Clusius, Carolus 



1605. Exoticorum Libri Decern. 

 Comes, O. 



1895. Snlla Sistemazione Botanica delle Specie e delle Razze del Genere 

 Nicotiana, Atti del E. Instituto d' Incoraggiamento di Napoli, 

 vol. 8. 



1899. Monographie du genre Nicotiana comprenant le classement 



botanique des tabacs industriels, Atti del E. Instituto d' 

 Incoraggiamento di Napoli, ser. V, vol. 1. 



1900. Historie, geographie, statistique du tabac, etc. 



1905. Delle Eazze dei Tabacclii Filogenesi, Qualita ed Uso, Atti del 

 R. Instituto d ' Incoraggiamento di Napoli, vol. 57. 

 Don, George 



1838. A General History of the Dicblamydeous Plants, vol. iv, Corol- 

 liflorae. 

 Douglas, David. 



1836. A sketch of a Journey to the Northwestern parts of the Con- 

 tinent of North America during the years 1824, 5, 6, and 7, 

 in W. J. Hooker's Companion to the Botanical Magazine, vol. 2. 

 DuNAL, Michel Felix 



1852. Solanaceae, in A. de Candolle, Prodromus Systematis Naturalis 

 Eegni Vegetabilis, vol. xiii, 1 : pp. 1-690. 

 East, E. M. 



1912. A Study of Hybrids between Nicotiana Bigelovii and N. quad- 

 rivalvis, Botan. Gazette, vol. 53. 

 Fischer, F. E. L. et Meyer, C. A. 



1846. Sertum Petropolitanum. 

 Gray, Asa 



1876. Gamopetalae, in Botany of Geol. Survey California, vol. 1. 

 1886. Synoptical Flora of North America. 

 Hasselbring, Heinrich 



1912. Types of Cuban Tobacco. Botan. Gazette, vol. 53. 



