rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium
[ Syn: mistflower , ageratum , conoclinium coelestinum , eupatorium coelestinum ]
rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium
[ Syn: mistflower , ageratum , conoclinium coelestinum , eupatorium coelestinum ]