Hydrangea macrophylla
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Illust
Color and Season
Color
American Blue
Delphinium lark spur
Morning Glory
Nicandra physalodes
Blue star
Balloon flower
Veronica schmidtiana
Gilia leptantha
Commelina
Vinca major
Passionflower
Linum grandiflorum 'blue dress'
Echinops ritro
Rosemary