46 



INTROGRESSIVE HYBRIDIZATION 



Glabrous 



■^- Pubescent 



Fig. 5 



O 



DO 



Glabrous. 



-»- Pubescent 



Fig. 6 



Figs. 5, 6, 7, and 8. Four possible kinds of relationship between two 

 figure represents a hypothetical sample of 25 individuals, each one scored 



indication of introgression. 



