பொருள் : Rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers. Sometimes placed in genus Eupatorium.
ஒத்த சொற்கள் : conoclinium coelestinum, eupatorium coelestinum, mist-flower, mistflower
பொருள் : Any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers.