Border bloomer in a garden

• Plant of the thistle or aster family
• Garden flower
• Border plant
• Any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers
• Rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers
• Sometimes placed in genus Eupatorium

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ageratum \A*ger"a*tum\ ([.a]*j[e^]r"[.a]*t[u^]m or [a^]j`[~e]r*[=a]"t[u^]m), prop. n. [NL., fr. Gr. 'agh`raton a sort of plant; 'a priv. + gh`ras old age.] (Bot.) A genus of plants, one species of which ( Ageratum Mexicanum ) has lavender-blue ...

Wikipedia Word definitions in Wikipedia
Ageratum , ( whiteweed in the USA), is a genus of 40 to 60 tropical and warm temperate flowering annuals and perennials from the family Asteraceae, tribe Eupatorieae. Most species are native to Central America and Mexico but four are native to the United ...

Wiktionary Word definitions in Wiktionary
n. (context uncountable English) Any of the genus (taxlink Ageratum genus noshow=1) of tropical American herbs, annuals and perennials, from the sunflower family Asteraceae, tribe Eupatorieae; they are sometimes used in floral displays.

WordNet Word definitions in WordNet
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 [syn: mistflower , mist-flower , Conoclinium coelestinum , Eupatorium coelestinum ] any plant ...