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Native Plant Database

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Ageratina altissima var. altissima (White snakeroot)
Bransford, W.D. and Dolphia

Ageratina altissima var. altissima (L.) King & H.E. Robins.

White snakeroot

Asteraceae (Aster Family)

Synonyms: Eupatorium rugosum

USDA Symbol: agala

USDA Native Status: Native to U.S.

An erect, much-branched perennial up to 4 ft. tall. Large, opposite, pointed-oval leaves. Flowers are tiny, pure white, and in flattish clusters near the top of the stalk.

 

From the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Flower:
Fruit:
Size Class: 3-6 ft.

Bloom Information

Bloom Color: White
Bloom Time: Aug , Sep , Oct

Distribution

USA: AL , AR , CT , DC , DE , FL , GA , IA , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , NC , ND , NE , NH , NJ , NY , OH , OK , PA , RI , SC , SD , TN , TX , VA , VT , WI , WV
Canada: NB , NS , ON , QC , SK
Native Distribution: Eastern Canada to Sask., s. to WV, upland GA & e. TX
Native Habitat: Rich woods; thickets; clearings; shady river bottoms
USDA Native Status: L48(N), CAN(N)

Growing Conditions

Light Requirement: Part Shade , Shade
Soil Moisture: Moist
Soil pH: Circumneutral (pH 6.8-7.2)
Soil Description: Rich soils.
Conditions Comments: Spreads by seed and can become weedy.

Benefit

Conspicuous Flowers: yes
Attracts: Birds

Propagation

Description: Sow seeds in the fall and plant thickly as germination is usually low. Vigorous portions of mature clumps can be divided in spring or fall.
Seed Collection: Not Available
Seed Treatment: Not Available
Commercially Avail: yes

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:

Lady Bird Johnson Wildflower Center - Austin, TX
Stengl Biological Research Station - Smithville, TX
* Available Online from Wildflower Center Store

Bibliography

* The Midwestern Native Garden: Native Alternatives to Nonnative Flowers and Plants An Illustrated Guide (2011) Adelman, Charlotte and Schwartz, Bernard L.

Search More Titles in Bibliography

Recommended Species Lists

Find native plant species by state. Each list contains commercially available species suitable for gardens and planned landscapes. Once you have selected a collection, you can browse the collection or search within it using the combination search.

View Recommended Species page

Additional resources

USDA: Find Ageratina altissima var. altissima in USDA Plants
FNA: Find Ageratina altissima var. altissima in the Flora of North America (if available)
Google: Search Google for Ageratina altissima var. altissima

Metadata

Record Modified: 2012-12-07
Research By: TWC Staff

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