ON THE TIGRIDIA 



the different ovules of the same plant, as demon- 

 strated by the fact that flowers, for example, of 

 different hues may be borne on plants grown from 

 a single seed pod. 



So if we are to present the matter quite in its 

 true light we should say that the aggregate pollen- 

 product and ovule-product of a plant must be con- 

 sidered as representing the personality that is to 

 say, the hereditary complex of the plant. 



No single pollen grain and no single ovule 

 contains representatives of all the types of heredi- 

 tary factors that are present in the germ plasm of 

 the plant as a whole. 



Stated otherwise, the pollen grains and ovules 

 are very specialized and concentrated portions of 

 matter, each of which contains a similar equip- 

 ment of the most fundamental of the hereditary 

 factors, but each of which contains a somewhat 

 different assortment of the less fundamental ones. 



All the plants that grow from the seed of a 

 tigridia, for example, will be unequivocally tigrid- 

 ias in stem and leaf. But there will be minor dif- 

 ferences among them as to details of size, as to 

 freedom of flowering, as to precise size of flower, 

 and as to the exact distribution of the color 

 markings. 



As a matter of course, when the seeds are the 

 product of cross-pollenizing, the offspring, repre- 



[93] 



