376 University of California Publicatiwis in Agricultural Sciences [Vol. 2 



LITERATURE CITED 

 Belling, J. 



1927. The nomenclature of cliroinosome groups. Nature, vol. 119, p. 926. 

 Bleier, H. 



1925. Chromosomeustudien bei der Gattung Trifolium. Jalirb. f. wiss. Bot., 

 vol. Hi, pp. GO-i-36. 

 Clausen, J. 



1927. Chromosome number and the relationship of species in the genus 

 Viola. Annals of Bot., vol. 41, pp. 677-714. 

 Erith, a. G. 



1924. White clover (T. repens L.). London, Duekwortli and Co. 150 pp. 

 HUSKINS, C. L. 



1927. On the genetics and cytologj^ of fatuoid or false wild oats. Jour. 

 Genetics, vol. 15, pp. 315-64. 

 Karpechenko, G. D. 



1925. Kaiyologisehe Studien iiber die Gattung Trifolium. Bull. Applied 



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

 1927. The production of polyploid gametes in hybrids. Hereditas, vol. 9, 

 pp. 349-68. 

 Lesley, M. M., and Frost, H. B. 



1927. Mendelian inheritance of chromosome shape in Matthiola. Genetics, 

 vol. 12, pp. 449-60. 

 Martin, J. N. 



1913. The physiology of the pollen of T. pratensc. Bot. Gaz., vol. 56, 



pp. 112-26. 



1914. Comparative morphology of some Leguminosae. Bot. Gaz., vol. 58, 



pp. 154-66. 

 McDermott, L. F. 



1910. An illustrated key to the Xorth American species of Trifolium. San 



Francisco, Cunningham, Curtis and Welch. 325 pp. 

 Nawaschin, M. 



1925. Morphologische Kernstudien der Crepis-Arten in Bezug auf die Art- 



bildung. Zeitschr. f. Zellforschung uud Mikroskoi)ische Anatomic, 

 vol. 2, pp. 98-111. 



1926. Variabilitiit des Zellkerns bei Crepis-Arten in Bezug auf die Art- 



bildung. Ihid., vol. 4, pp. 171-215. 

 Nawaschin, S. G. 



1912. iJber den Dimorphismus der Kerne in den somatischen Zellen bei 

 Galtonia candicans. Bull. Imp. Acad. Sci. St. Petersbourg, ser. 6, 

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SVESHNIKOVA, J. N. 



1927. Karyological studies in Vicia. Bull. Applied Bot. and Plant Breed- 



ing, vol. 17, pp. 37-72. 

 Taylor, W. K. 



1924. Cytological studies on Ga,steria. I. Chromosome shape and individu- 



ality. Am. Jour. Bot., vol. 11, pp. 51-59. 



1925. Chromosome constrictions as distinguishing characteristics in plants. 



Ibid., vol. 12, pp. 238-44. 



1926. Chromosome morphologj^ in Fritillaria, Alstrocmcria, SiJphium and 



other genera. Ihid., vol. 13, pp. 180-93. 



