204 LUTHER BURBANK 



presents such a character as the one I wished to 

 develop. 



Yet it should not be overlooked that there was 

 an element of pollenizing involved, even though 

 the pollenizing was not done by the plant experi- 

 menter. This is almost axiomatic because of 

 course the plant would have produced no seeds 

 unless its pistils had been pollenized. 



All that I had done, to be sure, was to trans- 

 plant the original geranium to a place where it 

 was isolated from any other plants of its species. 

 But such isolation in itself served to provide that 

 the pistils of the plant should be fertilized with 

 pollen from its own flowers. 



In other words, by isolating this Heuchera with 

 crinkled leaves it had been determined that the 

 pollen and ovules from the selected plant should 

 combine to produce the seed germs for the next 

 generation. And in so doing I made sure that 

 both hereditary strains that brought by pollen 

 and that brought by ovule should have the same 

 hereditary factors, because they were borne on 

 the same plant. 



This, then, was a case of inbreeding or "inten- 

 sification" which has been mentioned previously. 

 It was as far removed as possible from the hybrid- 

 izing experiments we have witnessed in which 

 species of widely different type, say the straw- 



