322 APPENDIX 



In these two experiments each pod yielded usually both kinds of 

 seeds. In well-developed pods which contained on the average six 

 . to nine seeds, it often happened that all the seeds were round 

 (Expt. 1) or all yellow (Expt. 2); on the other hand there were 

 never observed more than five wrinkled or five green ones in one 

 pod. It appears to make no difference whether the pods are 

 developed early or later in the hybrid or whether they spring from 

 the main axis or from a lateral one. In some few plants only a few 

 seeds developed in the first formed pods, and these possessed exclu- 

 sively one of the two characters, but in the subsequently developed 

 pods the normal proportions were maintained nevertheless. 



As in separate pods, so did the distribution of the characters vary 

 in separate plants. By way of illustration the first ten individuals 

 from both series of experiments may serve. 



As extremes in the distribution of the two seed characters in one 

 plant, there were observed in Expt. 1 an instance of 43 round and 

 only 2 angular, and another of 14 round and 15 angular seeds. In 

 Expt. 2 there was a case of 32 yellow and only 1 green seed, but also 

 one of 20 yellow and 19 green. 



These two experiments are important for the determination of 

 the average ratios, because with a smaller number of experimental 

 plants they show that very considerable fluctuations may occur. 

 In counting the seeds, also, especially in Expt. 2, some care is 

 requisite, since in some of the seeds of many plants the green colour 

 of the albumen is less developed, and at first may be easily over- 

 looked. The cause of this partial disappearance of the green 

 colouring has no connection with the hybrid-character of the plants, 

 as it likewise occurs in the parental variety. This peculiarity 



