1922] STOUT—STERILITY I21I 
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 
Fic. 6.—Plant of B. pekinensis, highly self-compatible during period of mid- 
bloom: no flower abortion; first flowers to bloom on laterals were self- pe ay oii 
ad correlation with main branch in physiological character according to t 
of bloo 
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 
