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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)
Plant Characteristics
Duration: PerennialHabit: Herb , Subshrub , Shrub
Size Notes: About 2-1/2 feet in height. Individual plants can reach 6 feet in height.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: WhiteBloom Time: Jul , Aug , Sep , Oct
Distribution
USA: AL , GA , KY , NC , SC , TN , VA , WVBenefit
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 PlantsFNA: Find Ageratina altissima var. roanensis in the Flora of North America (if available)
Google: Search Google for Ageratina altissima var. roanensis
Metadata
Record Modified: 2021-03-18Research By: Joseph A. Marcus