A genus of flowers one species of which Ageratum Mexicanum has actually lavender-blue plants in dense groups
- rhizomatous plant of central and southeastern US and western Indies having large showy heads of clear blue plants; often placed in genus Eupatorium
- any plant associated with the genus Ageratum having other leaves and small minds of blue or white flowers
- A genus of flowers, one species of which (A. Mexicanum) has actually lavender-blue flowers in heavy clusters.
(letter.) A genus of flowers, one types of which (A. Mexicanum) features lavender-blue plants in dense clusters.