I9ISJ 



BARTLETT—MASS MUTATION 



439 



./' 





riciL 

 nivcrjif, 



Fig. 6. — Mut. setacea: 6 rosettes of the F^ progeny of f. typica, from F, parent 

 Lexington E-5; the plant in the upper left-hand corner, Lexington £-5-88, is shown also 

 in fig. 3, 



