Mating parents Viola mandshurica W. Becker ( 2n=48 ) Viola verecunda A. Gray ( 2n=24 ) Viola x 'Yakumo' Viola mandshurica W. Becker x V. verecunda A. Gray Flower Shape Middle size. Basic parts have the feature of V. mandshurica, but small labial palp like V. verecunda. Color Although a color has much deep purplish red, it is changeful like V. mandshurica. Spur Season Stigma Aromatic Others Leaf Shape It has the in-between feature. At a flower term, it has the feature of V. mandshurica. Color Generally both sides are dark green. The back is tinged with red. Others Reference Information Others It is the hybrid between different group. It is strong, but poor at drying.