<nowiki>Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; Hydrangea serrata ʽBlue Billow’; cultivar of Hydrangea serrata</nowiki>