PLATE 10. 





B 



A. Raimannia and induced derivatives. Tin- three rows of plants in the background include some large 

 normal individuals and small mutants grown from seed taken from a capsule which had been treated 

 with calcium nitrate. The remainder are mutants "I tin second ijcneiation. 



I'.. Individuals grown from seeds taken from one capsule. The large rosette is of the parental type, the 

 smaller are derivatives, two of which have ironic into bloom at the same age and are scarcely so high 

 as the normal rosette. 



HELIOTYPE CO.. BOSTON. 



