340 University of California PubUcations in Agricultnral Sciences [Vol.2 



Cassini, H. 



1831. Descriptions de quelques synantherees de Tile Maurice. Ann. Sci. 

 Nat. ser. 1, vol. 23, pp. 84-93. 

 Collins, J. L., and Manx, M. C. 



1923. Interspecific hybrids in Crepis. II. A preliminary report on the result 



of hybridizing Crepis setosa Hall f. with C. capillaris (L.) Wallr. 



and with C. biennis L. Genetics, vol. 8, pp. 212-232. 

 Dig BY, L. 



1014. Critical study of the cytology of Crepi.s virens. Arch. f. Zellforsch., 



vol. 12, pp. 97-146. 

 FiORi, A., AND Paoletti, G. 



1904. Flora analyticn d 'Italia, vol. 3, pp. 428-442. Pndova. 

 Greene, E. L. 



1897. The hop trefoils. Pittonia, vol. 3, pp. 201-206. 

 Heilborn, O. 



1924. Chromosome numbers and dimensions, species formation ;ind phyl- 



ogeny in the genus Carex. Ilereditas, vol. o, pp. 9-216. 

 Hoffmann, 0. 



1891. In Die natiirlichen Pflanzen f;innlien, vol. 4, no. a, pp. 373-374. 

 Leipzig. 

 HCOKER, J. D. 



1882. The Flora of British India, vol. 3, 395 pp. London. 



ISHIKAWA, M. 



1916. A list of the number of chromosomes. Bot. Mag. Tokyo, vol. 30, 



pp. 404-448. 

 1921. On the chroniosomes of Lactuca (a preliminary note). Bot. Mag. 

 Tokyo, vol. 35, pp. 153-158. 

 JLEL, H. O. 



1905. Die tetradteilungen bei Taraxacum und andere Cichorieen. Kungl. 



Svensk. Vetensk. Akad. Handl., vol. 39, pp. 1-20. 

 Karpetchenko, G. 



1925. Karyological sketch of tlie genus Trifolium L. (in Russian). Bull. 



Appl. Bot. and Plant Breeding, vol. 14, pp. 1-9. 

 McClung, C. E. 



1908. Cytology and taxonomy. Kansas Univ. Science Bull., vol. 4, pp. 

 199-215. 



1917. The multiple chromosomes of Hesi)erotettix and Mermiria (Orth- 



optera). Jour. Morph., vol. 29, pp. 519-590. 

 Mann, M. C. 



1925. Chromosome number and individuality in the genus Crepis. I. A 

 comparative study of the chromosome number and dimensions of 

 nineteen species. Univ. Calif. Publ. Agr. Sci., vol. 2, pp. 297-314, 

 plate. 53. 

 Marchal, E. 



1920. Recherches sur les variations numeriques des chromosomes dans la 

 serie vegetale. Memoires I'Acad. roy. Belg. (classe sc), ser. 2, 

 vol. 4, pp. 1-108. 

 Metz, C. W. 



1914. Chromosome studies in the Diptera. I. A prelimin;trv survey of five 

 different types of chromosomes in the genus Drosophila. Jour. Exp. 

 Zool., vol. 17, pp. 45-56. 

 1916. Idem. III. Additional types of chromosome groups in the Drosophili- 

 dae. Am. Nat., vol. 50, pp. 587-599. 



