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Bransford, W.D. and Dolphia
Ageratina altissima var. altissima (L.) King & H.E. Robins.
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.
Plant CharacteristicsDuration: Perennial Habit: Herb Flower:
Fruit: Size Class:
Bloom InformationBloom Color: White
Bloom Time: Aug , Sep , Oct
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
, 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 ConditionsLight 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.
BenefitConspicuous Flowers: yes
PropagationDescription: 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
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Record Modified: 2012-12-07
Research By: TWC Staff