Joe-Pye Weed; Trumpet Weed; Purple Thoroughwort; Gravel or Kidney-root; Tall or Purple Boneset eupatorium purpureum Flower-heads-Pale or dull magenta or lavender pink, slightly fragrant, of tubular florets only, very numerous, in large, terminal, loose, compound clusters, generally elongated.
"Wild Flowers Worth Knowing"
Neltje Blanchan et al
This plant also is named eupatorium because it refers, as Pliny says, to Eupator, a king of Pontus.
"Herbal Simples Approved for Modern Uses of Cure"
William Thomas Fernie
One of the giants is purple eupatorium, which sometimes carries its corymbs of flesh-colored flowers ten and twelve feet high.
"A Year in the Fields"
John Burroughs