White Heath Aster

Clump of this dainty daisy like aster in my back garden. Bee's still interested (last day noted for the Ruby Throated Hummingbird here before their journey south). Perennial Herb, 2 to 5 feet tall, stout root crown, upper stems branched: Leaves: Basal oblanceolate, petioled, 1 to 4 inch long; alternate - linear to elliptic, becoming sessile upward. slightly toothed. Flowers: Ray flowers white.