Abstract
The morphology of Japanese senega, said to originate from Polygala Senega L. var. latifolia Torr. et Gray, was studied. The Japanese senega was found to be similar to the Northern senega, generally used as drugs, in that it possessed many branched lateral roots and fine rootlets, especially with strong tendency of lateral roots to bend, and showing keel and abnormal growth of internal structure. These facts probably indicate that the botanical origin of the two drugs are quite closely related. It was also found that the characteristics of Japanese senega were almost identical with those of Southern senega.
