Flora of Pennsylvania

Ageratina altissima

Ageratina altissima white snakeroot

Plant grows in the wild/spontaneouslyPlant is native to PA Synonyms:   Eupatorium rugosum

 Perennial wildflower, sometimes branching. Stems and leaves are mostly smooth (without hair), leaves heart-shaped reducing in size up the stem.  Flowers white in flat-topped clusters.

Grows in woodlands, rich woods, thickets.

Present throughout the state.

Wetland codes
EMP: FACU
NCNE: FACU



Flowers late July to October.

Leaves  simple, opposite, toothed, heart-shaped.  Three prominent veins on the upper surface of the leaves.

Height  1.5 - 3 feet tall.

Flowers  white in clusters, flower heads have only disk flowers.

S-rank:  No Rank
G-rank:  G5 (Secure)

Ageratina altissima white snakeroot

Plant grows in the wild/spontaneouslyPlant is native to PA
Synonyms:   Eupatorium rugosum

Ageratina altissima gallery
Plant Life-Form
perennial forb
Common Names
white snakeroot