/ 

 / 



Y 



Fig. 6 ( 250 %). 



a: V. arvensis (population T, table I) from Tunø: homotypic meta- 



p h as is in a pollen-mother cell. 17 chromosomes. 

 b: V. tricolor (population X, table I) from Selvig, Samsø: diakinesis in a 



pollen-mother cell: 13 chromosomes. 



# .TA / : 



ski ' « / -/ J 



Fig. 7 ( 250 %). 



a-g: Reduction division in a spontaneous hybrid parv, lut. (V. 246 — 14). 



a: homotypic metaphasis: 13 chromos. 



b: heterotypic metaphasis: 14 chromos. 



c: homotypic metaphasis: 15 chromos. 

 d-g: early heterotypic anaphases seen from the pole; varying number 

 of chromosomes. 



h: early heterotypic anaphasis in artifical hybrid parv, lut (Fi). 



Botanisk Tidsskrift. 37. Bind. 25 



