PLANT HYBRIDIZATION BEFORE MENDEL 173 



III. P. sativum macrospermum (very tall, with purple flowers 

 and greenish-yellow seeds) X P- sativum nanum repens 

 (with white flowers and yellow seeds). 



From four flowers pollinated fruits were obtained, containing 

 as follows : 



1. 4 "somewhat more dirty-yellow seeds than those of the 

 maternal parent, which are more greenish," an evident 

 observation of dominance 



2. 4 seeds similar to the above 



3. 4 seeds which did not mature 



4. 4 seeds similar to (1). 



IV. Pisum sativum nanum repens X Pisum sativum viride 

 (with white flowers and green seeds). 



Four pods were produced. The result as to the seeds is reported 



as follows : 



"On complete ripening and desiccation of the pods and of the seeds, 

 there was, however, no essential difference to be described between those 

 arisen from natural (maternal) fertilization, and those arisen from 

 hybridization ; only that the hybrid peas appeared to be somewhat more 

 round and less uneven. The color was not different." (p. 83.) 



V. Pisum sativum 7ianum repens (with white flowers and yel- 

 low seeds) X ■^- sativum viride. Six flowers were pollinated, 

 producing altogether 22 seeds, which all appear to have 

 been round with greenish-yellow color. 



VI. Pisum sativum viride (with blue or green seeds) X •^• 



sativum luteum. 

 But one flow^er was pollinated, producing a single seed 



". . . which was not decidedly yellow, still less blue or green, but dirty 

 yellow, thus incontrovertibly changed in color, since the flowers left to 

 self-fertilization furnished simply green or blue seeds." (p. 84.) 



VII. Pisum sativum viride X P- sativum macrospermum. 



Five flowers pollinated, from which-- four pods were obtained, 

 containing in all 12 seeds, all round and yellow, with the excep- 

 tion of one that did not come to maturity. 



VIII. Pisum sativum viride X P- sativum nanum repens. 



One flower pollinated; five seeds produced, all pale yellow. 



Gartner did not follow out the distribution of form and color 

 in the seeds to the second generation. The statement which most 



