1922] Sctchell-Goodspeed-Clausen: Nicatiana Tahacum 521 



Castle, W. C. 



1919. Piebald rats and the theory of genes. Proe. Nat. Acad. Sci., vol. 4, 

 pp. 126-130. 



Collins, G. N. 



1917. Hybrids of Zea ramosa and Zea tunicata. Jour. Agric. Ees., vol. 9, 

 pp. 383-396. 

 Comes, O. 



1899. Monographie du genre Nicotiana eomprenaut le classement botanique 

 des tabacs industriels. Atti del E. Institute d 'Incoraggiamento di 

 Napoli, ser. V, vol. 1. 

 1905. Dello razze dei tabacehi filogenesi, qualita ed uso. Ibid., vol. 57. 



East, E. M. 



1913. Inheritance of flower size in crosses between Nicotiana species. Bot. 

 Gaz., vol. 55, pp. 177-188. 



GOODSPEED, T. H. 



1912. Quantitative studies of inheritance in Nicotiana hybrids. Univ. Calif. 

 Publ. Bot., vol. 5, pp. 87-168. 

 GooDSPEED, T. H., and Clausen, E. E. 



1917. The nature of the Fi species hybrids between Nicotiana sylvestris and 



varieties of N. Tahacum. Univ. Calif. Publ. Bot., vol. 5, pp. 301-348. 



Harlan, H. V. 



1918. The identification of varieties of barley. U. S. Dept. of Agric, Bull. 



622, pp. 1-32. 

 Hayes, H. K. 



1912. Correlation and inheritance in Nicotiana Tahacum. Conn. Agric. Exp. 



Station, Bull. 171, pp. 1-45. 



Hayes, H. K., East, E. M., and Beinhart, E. G. 



1913. Tobacco breeding in Connecticut. Conn. Agric. Exp. Station, Bull. 



176, pp. 1-68. 



Hasselbring, H. 



1912. Types of Cuban tobacco. Bot. Gaz., vol. 53, pp. 113-126. 

 Howard, A., and Howard, Gabrielle L. C. 



1910. Studies in Indian tobaccos. No. 2, The types of Nicotiana Tahacum L. 

 Mem. India Dept. Agric. Bot. Series, vol. 3, pp. 59-176. 



Howard, Gabrielle L. C. 



1913. Studies in Indian tobaccos. No. 3, The inheritance of characters in 



Nicotiana Tahacum L. Ihid., vol. 6, pp. 25-114. 



MULLER, H. J. 



1918. Genetic variability, twin hybrids, and constant hybrids in a case of 

 balanced lethal factors. Genetics, vol. 3, pp. 422-499. 



EiDGWAY, Egbert 



1912. Color standards and color nomenclature. 



Setchell, W. a. 



1912. Studies in Nicotiana, 1. Univ. Calif. Publ. Bot., vol. 5, ])]). 1-86. 

 White, O. E. 



1913. Bearing of teratological development in Nicotiana on theories of 



heredity. Am. Nat., vol. 47, pp. 206-229. 



1914. The history of Nicotiana, II. An account of the heredity and envi- 



ronirient of a family of tobacco plants. Brooklyn Bot. Garden 

 Loaflots, Series 2, No. 12. 



