Eupatorium maculatum var. urticifolium Barratt ex Alph.Wood
Eupatorium purpureum var. maculatum (L.) Darl.
Eupatoriadelphus maculatus var. bruneri (A.Gray) R.M.King & H.Rob., syn of var. bruneri
Eupatorium maculatum var. bruneri (A.Gray) Breitung, syn of var. bruneri
Eupatorium maculatum subsp. bruneri (A.Gray) G.W.Douglas, syn of var. bruneri
Eupatorium purpureum var. bruneri (A.Gray) B.L.Rob., syn of var. bruneri
Eupatorium trifoliatum var. bruneri (A.Gray) Farw., syn of var. bruneri
Eupatorium bruneri var. foliosum (Fernald) House, syn of var. foliosum
Eupatorium maculatum var. foliosum (Fernald) Wiegand, syn of var. foliosum
Eupatorium purpureum var. foliosum Fernald, syn of var. foliosum
Eupatorium trifoliatum var. foliosum (Fernald) Farw., syn of var. foliosum
Eutrochium maculatum, the spotted joe-pyeweed,[2] is a North American
species of
flowering plant in the family
Asteraceae. It is widespread through much of the United States and Canada.[3] It is the only species of the genus Eutrochium found west of the
Great Plains.[4]
This
herbaceousperennial sometimes grows as high as 2 m (6 ft 7 in). Stems are sometimes completely purple, sometimes green with purple spots. One plant can produce numerous rose-purple flower heads in late summer, each head with 8-22 disc flowers but no ray flowers.[5] The
specific namemaculatum, meaning spotted, refers to the purple spots on the stem.[6][4]
Spotted joe-pyeweed thrives in marshes, rich fens and swamps. It also does well in man-made moist expanses such as ditches, seepage areas and wet fields. Above all else the plant flourishes in the non-shaded environments that are also abundant in wetlands.[7][8]