FACTORS OF INCREASE 



113 



loptnent of the reproductive parts, and less 

 of vegetative parts, than small seeds do. 



It is intended here to directly compare the 

 reciprocal relations of the two sides of the 

 plant as influenced b^^ the parent seeds. The 

 data may be taken by weighing the fruiting 

 portion and comparing it with the weight of 

 all the remainder of the plant, both done 

 when at their best development ; or other 

 methods may be used. 



Excellent data are supplied from the re- 

 searches of Lehmann (see table viii). He 

 grew large, medium and small peas, over 400 

 of each lot, and obtained plants that were 

 heavier for the larger seed in both their vege- 

 tative and their reproductive parts, i. e., the 

 leaves and stalks for the vegetative part and 

 the peas and pods for the reproductive part. 

 And yet when the weight of the vegetative 

 portion is compared with that of the repro- 

 ductive portion of each lot, it is clear that the 

 fruiting part has attained a stronger devel- 

 opment in comparison to the remainder of 

 the plant in the lots from larger seeds. To 

 state the facts in another way, the larger 

 seeds not only grow larger plants, but those 

 which have fruiting parts more strongly de- 

 veloped than the associated vegetative parts. 



Interesting data are furnished by Birnerand 

 Troschke using oats and peas, and by Marek 



Vegetative and 

 fruiting parts 

 compared 



