Synonyms:
ageratum
Meaning: any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers
Synonyms:
mistflower, mist-flower, ageratum, Conoclinium_coelestinum, Eupatorium_coelestinum
Meaning: rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium