Sweet Joe-Pye Weed (Eupatorium purpureum)
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- Hollow Joe-Pye Weed
Stem of hollow Joe-Pye weed is tinged with purple, while that is sweet is green with black or purple at the joints, with a white bloom. Hollow JPW has leaves usually in whorls of 6, with sweet JPW usually has whorls of 3 or 4.
- Spotted Joe-Pye Weed
Stems of sweet Joe-Pye weed are green with purple or black at the joints; stems of spotted Joe-Pye weed are spotted throughout with purple, or are completely purple.
- White Thoroughwort
Joe-Pye weed is normally pink, though rarely white. Thoroughword flowers grow in a flat cluster, while Joe-Pye weed had a large, domed cluster of flowers.