| Noun | 1. | genus Boltonia - genus of tall leafy perennial herbs of eastern America and eastern Asia having flowers that resemble asters asterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs aster family, Asteraceae, Compositae, family Asteraceae, family Compositae - plants with heads composed of many florets: aster; daisy; dandelion; goldenrod; marigold; lettuces; ragweed; sunflower; thistle; zinnia false chamomile - any of various autumn-flowering perennials having white or pink to purple flowers that resemble asters; wild in moist soils from New Jersey to Florida and Texas |