A (named for Charles Amson). Called also Ansonia. Apocymiceu». Tough-barked perennial herbs of eastern N. Amer. and .lap., with terminal panicles of blue or bluish narrow-limbed small fls. in May and June, the inside of the corolla tube bearing reflexed hairs. Grown in the hardy border, mostly with shrubbery. Prop. mostly by dividing the clumps; also by seeds and by cuttings in summer.