KEY TO THE VARIETIES

1	Leaves glabrous below (region around insertion of petiole sometimes puberulous). 2
1'	Leaves puberulous below (apart from region around insertion of petiole. Stephania japonica var. discolor
2	Inflorescences glabrous Stephania japonica var. japonica
2'	Inflorescences puberulous. Stephania japonica var. timoriensis