A genus of plants, several of which are grown for their floral displays. They are tropical American herbs, annuals and perennials, from the Sunflower family Asteraceae, tribe Eupatorieae
rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium
Any plant of the genus Ageratum, of the composite family, native to tropical South America. Ageratum have toothed, oval leaves that are opposite each other on the stem; compact clusters of blue, pink, lilac, or white flowers; and small, dry fruits. Dwarf varieties are used as edging plants. Some ageratum are variously known as flossflower and pussyfoot