Ageratina altissima subsp. altissima (L.) R.M.King & H.Rob.
Family: Asteraceae
white snakeroot
[Ageratum altissimum "L., non Eupatorium altissimum L.",  more]
Ageratina altissima subsp. altissima image
Robert W. Freckmann  
Etymology: Eupatorium: from Greek name Mithridates Eupator, King of Pontus about 115BC who is said to have discovered an antidote to a commonly used poison in one of the species
Plants: erect, perennial, 1'-5' tall forb with 1 to 3 mostly hairless, leafy stems
Leaves: opposite, blade 1 1/2 to 5 times longer than the long stalk, bases rounded, edges coarsely toothed leaf drawing
Flowers: head with 12-25 white disk flowers; inflorescence 3" flat to roundish, branched clusters of many heads; blooms July-Oct.
Fruits: dry seed on fluffy pappus
Habitat: moderate moisture; woods, disturbed sites; in rocky soil
Hazardous: Careful, this plant is hazardous!
Conservation Status: Native - potentially invasive
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Christopher Noll  
Ageratina altissima subsp. altissima image
Merel R. Black  
Ageratina altissima subsp. altissima image
Merel R. Black  
Ageratina altissima subsp. altissima image
Hugh H. Iltis  
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
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Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Christopher Noll  
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Merel R. Black  
Ageratina altissima subsp. altissima image
Kenneth J. Sytsma  
Ageratina altissima subsp. altissima image
Botancial Illustration  
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Christopher Noll  
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Merel R. Black  
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
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Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
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Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
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Ageratina altissima subsp. altissima image
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Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
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Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
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Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
Ageratina altissima subsp. altissima image
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