Eutrochium fistulosum (Barratt) E. E. Lamont (redirected from: Eupatorium fistulosum)
Family: Asteraceae
hollow Joe-pye-weed,  more...
[Eupatorium fistulosum Barratt,  more]
Eutrochium fistulosum image
Paul Rothrock  
From Flora of Indiana (1940) by Charles C. Deam
Infrequent to frequent in springy and wet places in woods and along streams in the southern half of the state. Formerly I did not recognize the three species of the Joe-pye-weeds and, if I had, I might have been able to extend the range of this species farther north in the state.
Similar to no. 4 [Eupatorium purpureum L.], often more robust, to 3 m; stem strongly glaucous, usually purplish throughout, hollow with a large central cavity; lvs mostly in 4's to 7's, more elliptic, generally narrowly so, with mostly finer, more rounded, blunter teeth; cor generally bright pink-purple; 2n=20. Bottomlands and moist woods; s. Me. to Io., s. to Fla. and Tex. July-Sept.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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