Hydrangea serrata ( Bluebird Lacecap Hydrangea )
H. serrata and its cultivar are also sometimes listed as H. macrophylla subsp . serrata . ‘ Bluebird ’ is also sometimes list as ‘ Acuminata ’ . Deciduous , unsloped shrub with slender stem and pointed , 6 column inch long , ovate leaves , which are much more narrow than its Bigleaf Hydrangea relatives . Foliage turns red in fall . Flowers are held in flat , 2 to 4 in widely , lacy corymb and borne from summertime to come down ....