Rudolph Beer 217 



the existence of irregularities in the distribution of the chromosomes 

 during the uieiotic divisions. 



Observations have been made to determine the extent of the 

 occuiTence of such irregularities of pollen development in a number of 

 species and hybrids of Fuchsia with the following results : 



A. Forms with irregular pollen development or all steinle pollen. 

 Fuchsia glohosa. 



F. corallina. 



F. excorticata. 



F. parviflora (no pollen development ; anthers collapsed). 



F. Cottinghami (no pollen development; anthers collapsed). 



F. macrostemma, var. conica. 



F. macrostemma, var. discolor. 



F. simplicicaulis (most marked early in the season). 



F. arborescens. 



F. Riccartoni. 



F. virgata x F.fulgens (3iV). 



F. virgata x F. fulgens (3 P). 



B. Forms luith regular pollen development 

 Fuchsia fulgens. 



F. procumbens. 



F. gracilis. 



F. rejlexa. ' 



F. virgata. 



F. myrtifolia. 



F. alpestris. 



F. pumila. 



F. corymbijlora. 



F. venu^ta. 



F. rosea. 



F. pumila x F. alpestris (2 N ). 



F. pumila x F. alpestris {2 F). 



F. globosa x F. gi^acilis (11 ^4). 



F. globosa x F. gracilis (11 B). 



F. globosa x F. Riccartoni (10^4). 



F. fulgens x F. virgata. 



F. corymbijlora x " Ballet Girl." 



The iiTegularities in the distribution of the chromosomes in the 

 Fuchsias frequently leads to the sterility of the pollen grains. Tischler 



