Rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium - mistflower, mist-flower, Conoclinium coelestinum, Eupatorium coelestinum
Any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers
Derived forms: ageratums
Type of: flower
Part of: Conoclinium, genus Ageratum, genus Conoclinium