1922] 



STOUT—STERILITY 



selfed fell soon after the petals had fallen. In other plants, and 

 especially plants of B. chinensis, nearly all the pistils of selfed 

 flowers remained attached only during the period of mid-bloom. 



Self-compatible plants. — A total of 718 plants of the various 

 cultures grown were self-compatible in some degree. For the 



Fig. 6. — Plant of B. pekinensis, highly self-compatible during period of mid- 

 bloom; no flower abortion; first flowers to bloom on laterals were self-compatible, 

 showing correlation with main branch in physiological character according to time 

 of bloom. 



purpose of a general classification the self-compatibility was judged 

 as feeble, medium, and strong, but there were many grades within 

 each class with no sharp distinctions between them. The weakest 

 grade includes the cases in which, most typically, a few small pods 

 containing only aborted seeds developed. In some cases pods of 

 good size were formed, as is shown in fig. 5, but the seeds were all 



