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Description

This perennial plant is 3-8' tall and unbranched. The central stem is erect and unbranched, except near the apex where the inflorescence occurs. It is usually winged, with long white hairs between the ridges. On rare occasions, the central stem lacks wings. The alternate leaves are up to 10" long and 2½" across; they taper gradually to petiole-like bases. The leaves are elliptic or lanceolate in shape; their margins are smooth, slightly serrated, or sparsely dentate. The upper surface of the leaves is medium green or olive-green and its texture is rough. The lower surface of the leaves is light green with white hairs along the major veins.

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© John Hilty

Source: Illinois Wildflowers

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