Ageratina altissima (L.) R.M.King H.Rob.

White Snakeroot

Family: Compositae

Genus: Ageratina

Category: Perennial

Zones: 3 to 7

Size: 1 to 3' tall

Exposure: Sun, Filtered Sun, Part Shade


Tall stems with flat-topped clusters of greyish-white flowers in summer. Leaves opposite, long and pointed.


'Snowball' - white flowers

Subordinate taxa: 


Published in Phytologia 19: 212 in 1970.

Native to the US and Canada.

Previously placed in the genus Eupatorium.

Basionym Ageratum altissimum.

Sources of Information

© 2010-12 Lisa J. Miner