Ageratum - Definition
ageratum
n 1: 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, mist-flower, ageratum, Conoclinium
coelestinum, Eupatorium coelestinum]
2: any plant of the genus Ageratum having opposite leaves and
small heads of blue or white flowers