CH. Ill] 



LEMNA. 



65 



(P). Four or five weeks (in May) are necessary to give 

 the result. Owing to an accident the figures do not 

 show the strong growth of roots in (S)\ 



FIG. 12. Exp. 77. (Reduced.) 



FIG. 12. Exp. 77. (Beduced.) 



1 In both cultures there were originally 6 plants each with 3 fronds. 

 D. A. 5 



