igisl 



BARTLETT—UASS MUTATION 



447 



Fig. 10. — ilvit. albicans: 6 rosettes of the Fa progeny of f. typica, from Fi parent 

 plant Lexington E-5; the right-hand plant in the middle row, Le.xington E-5-190, 

 will be found in fig. 2; the two plants in the lower row, E-5-191 (left) and 195 (right), 

 will be found respecti\'ely in figs. 3 and 4. 



