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Eupatorium rugosum

Common Name of Species: White Snakeroot 
Family: Asteraceae

Entry Author:  C. Friedl, Muhlenberg College
Description: White snakeroot can be identified by it’s heart shaped, sharply toothed leaves, and it’s long, slim leaf stalks.  Can also be identified by the flowers which bloom in mid to late fall, and the umbel shape of the white flower clusters.

Leaves are sharply toothed and heart shaped, although sometime ovate.  Leaf stalks are long and thin. Can be small or large, although most leaves grow to between 2 ˝ - 7 inches length.
Flowers are clustered, flatly, at the very top of the stem. Each separate flower, is just a disk, and doesn’t have any rays.  The disks are white, fuzzy and approximately 1/8 of an inch wide
Stems are smooth, erect and branching. 
Grow 1-3 feet tall.
Branching Pattern of Leaves:  Leaves grow opposite of one another. 

Can be found in woods and thickets.
Throughout North America. 

Niering, W.A., Olmstead, N.C, & Thieret, J.W. (2001). National Audubon Society Field Guide to North American Wildflowers Eastern Region (Revised Edition).  New York: Random House Inc.

Newcomb, Lawrence (1977).  Newcomb’s Wildflower Guide.  New York: Little, Brown.

McKenny, M. & Peterson R.T. (1996). Peterson Field Guides: Wildflowers Northeastern/ North-central North America. New York: Houghton Mifflin.

USDA, NRCS (2004). Plants Database, Version 3.05 (  National Plant Data Center, Baton Rouge, LA 70874 USA.


This page was created by: C. Friedl, Muhlenberg College
Last updated 11/10/05