PLANT HYBRIDIZATION BEFORE MENDEL 



13 



of maize, two hundred years after its introduction into Europe, 

 the fact that on removing the pollen-bearing flowers from the 

 staminate inflorescence of an isolated plant the seeds remained 

 unfertilized. 



Plate XI. Rudolph Jacob Camerarius, 1665-1721. From Ostwald's "Klassiker der exak- 

 ten Wissenschaften." No. 105. 



