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Spotted Joe-Pye weed flowerheads are pink to pinkish-purple, about 8 mm long, consisting of 8-20 disk florets, each with a tubular corolla with five tiny spreading lobes at its apex, five stamens with white anthers, and two long, thin white styles that extend well outside the floret; there are no ray florets. The flowers make either a rather flat or domed cluster (panicle) at the apex of the plant. The bracts (phyllaries) around the base of the flower are purple-tinged or the same color as the disc florets. Spotted Joe Pye weed (E. maculatum) has purple or purple-spotted, hairy stems and flowers with 8-20 disc florets; sweet Joe Pye weed (E. purpureum) has green, hairless stems with purple color only at the leaf nodes and flowers with 4-7 disc florets.

Eutrochium

Eutrochium maculatum

spotted Joe-Pye weed [Blooms: Jun-Sep]