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LAM\K( KS EVENIN<; IMtlMHOSK 



This common flower is supposed to be a native of the central eastern portion of the United 

 States/but was early introduced to Europe and is now found wild there in "^^^ny 1'"^^ " 

 ties The Dutch botanist Huko <le Vries found a number of theni in a held nea: Hih r- 

 sum. Holland, which were uncler^oing unusual changes in form. He brought them to s 

 Karden. propagated them, an.l found thai these changes were continually l''"''' '^'^;'- y^;'^ 

 some of them were very great, and that m..st ot them bre.l true. 1 his was Hh" sli ting 

 point of the Mutation Theory wliich marks an eix.ch in the study ot evolution. (I ig. 1.) 



