1. Blakeslee, A. F. (1927). “Genetics of Datura.”Verh. der Vten Int. Kongr. f. Vererb.
2. Cleland, R. E. (1926). “A Cytological Study of Meiosis in Anthers ofOenothera muricata” Bot. Gaz. lxxxii.
3. - (1926). “Meiosis in the Pollen Mother Cells ofOenothera biennis andOenothera biennis sulfurea” Genetics xi.
4. - (1927). “The Genetics ofOenothera in relation to Chromosome Behaviour, with special reference to Certain Hybrids.”Ibid.
5. Davis, B. M. (1911). “Cytological Studies onOenothera, III.”Ann. Bot. xxv.