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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Ageratina altissima var. roanensis (Appalachian white snakeroot)
Cressler, Alan

Ageratina altissima var. roanensis

Ageratina altissima (L.) King & H. Rob. var. roanensis (Small) Clewell & Woot.

Appalachian White Snakeroot, Appalachian Tall Boneset

Asteraceae (Aster Family)

Synonym(s): Eupatorium roanense, Eupatorium rugosum var. roanense, Eupatorium urticifolium

USDA Symbol: AGALR

USDA Native Status: L48 (N)

 

From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb , Subshrub , Shrub
Size Notes: About 2-1/2 feet in height. Individual plants can reach 6 feet in height.
Size Class: 1-3 ft. , 3-6 ft.

Bloom Information

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

Distribution

USA: AL , GA , KY , NC , SC , TN , VA , WV

Benefit

Warning: Ageratina altissima contains the toxin tremetol. It is poisonous to livestock and to humans. Humans may be poisoned by consuming meat or milk from poisoned animals and many early European-Americans died in this way. This malady is commonly referred to as Milk Sickness.
Conspicuous Flowers: yes
Nectar Source: yes
Poisonous: yes

Additional resources

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

Metadata

Record Modified: 2014-09-10
Research By: JAM

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