ageratum
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- n rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium
- n any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers
- Taking a different approach, Entomologist William Bowers, of the New York State Agricultural Experiment Station, has isolated two substances from ageratum, a flowering plant, that .
- More than 60,000 red begonia, white chrysanthemum and blue ageratum plants splashed color through the exhibitsnot out of any special patriotic fervor, but because they are the .