PLATE 29 



The Cbenate-leaved Type 



Fig. 14. April 6, 1909. Crenate-leaved apparent mutants. Note the varia- 

 tion in leaf serration, and especially the slightness of the serration (or crenation) 

 with the one cool-house i^lant (below). 



Fig. 15. April 14, 1911. Progeny of a crenate-leaved parent, grown in a 

 cool greenhouse. The first two plants at the right are Snowflake, the rest 

 crenate. 



[178] 



