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Eupatoriadelphus maculatus var. maculatus (L.) King & H.E. Robins.
Spotted trumpetweed, Spotted joe-pye-weed
Synonyms: Eupatorium maculatum var. maculatum
USDA Symbol: EUMAM3
USDA Native Status: Native to U.S.
Atop a sturdy purple or purple-spotted stem, hairy above, is a large pinkish-purplish, flat-topped cluster of fuzzy flower heads. Spotted joe-pye weed can grow from 2-7 ft. or taller in soils that are moist through the season. Narrow, lance-shaped leaves, up to 10 in. long, are whorled along the purple spotted stem. The huge, domed flower head is composed of several branches bearing tiny, pinkish-lavender florets.
This is one of several similar species found in the East. Sweet Joe-Pye-weed (Eutrochium purpureum) has a greenish stem, a dome-shaped cluster of dull pink flower heads, and foliage that smells like vanilla when crushed. Hollow Joe-Pye-weed (Eupatoriadelphus fistulosus) has a hollow stem, and Eupatoriadelphus dubius is a smaller species with ovate leaves. Folklore tells that a Native American named Joe Pye used this plant to cure fevers and that the early American colonists used it to treat an outbreak of typhus.
Plant CharacteristicsDuration: Perennial Habit: Herb Fruit: Size Class:
Bloom InformationBloom Color: Red , Purple
Bloom Time: Jul , Aug , Sep
AZ , CO , CT , IA , ID , IL , IN , KS , KY , MA , MD , ME , MI , MN , MO , MT , NC , ND , NE , NH , NJ , NM , NY , OH , PA , RI , SD , TN , UT , VA , VT , WA , WI , WV , WY Canada: BC
, SK Native Distribution:
Nf. to s.c. MT, s. to MD, NC mts., KY, LA, KS, NM & UT Native Habitat:
Swamps & marshes; meadows; moist woodlands; stream banks USDA Native Status: L48(N), CAN(N),
Growing ConditionsLight Requirement:
Part Shade Soil Moisture:
Wet Soil Description:
Moist or wet, calcareous soils. Conditions Comments:
Tall and bushy with whorled
leaves and purple-spotted stems. (Ontario Native
BenefitUse Wildlife: An important source of honey, attracting pollinators by the score.
Use Medicinal: Folklore tells that an Indian, Joe Pye, used this plant to cure fevers and that the early American colonists used it to treat an outbreak of typhus. (Niering)
Conspicuous Flowers: yes
Fragrant Flowers: yes
Sow seeds in the fall and plant thickly as germination is usually low. Propagation is also possible by softwood cuttings taken in late spring or by division. Divide the plants in fall as they go dormant, or in the spring just as shoots first appear. Seed Collection:
The nutlets mature to shiny black 4-5 weeks after the flower has faded. Only a small percentage viable; these will be plump and swollen. To collect, either take the entire
top of the plant or shake it into a paper bag. Seeds can be allowed to dry out before sowing and do not have to be perfectly cleaned. Store in a sealed refrigerated container. Seed Treatment:
This species requires or benefits from a three month period of cold-moist stratification. Commercially Avail:
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Record Modified: 2013-03-25
Research By: TWC Staff