Two species of the genus Viola Linn., Viola huoeiana W. Beck.and Viola Pulla W. Beck.missed by Flora Reipublicae Popularis Sinicae are reduced to the synonymy of Viola verecunda A. Gray and Viola lucens W. Beck., respectively.
周劲松, 龚琴, 刑福武.中国堇菜（堇菜科）两新异名[J].热带亚热带植物学报,2007,15(4):366~368