Synonym:  Eupatorium dubium

              

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Perennials.  Stems are usually uniformly purple or purple-spotted, solid in cross-section, glabrous toward the base, becoming glandular toward the summit. Typical plant height is from 2 to 4 ft. (6 to 12 dm).

The overall inflorescence is corymb-like, flat- or round-topped.  Branch inflorescences are corymb-like, flower heads are located at the tips of branches on short peduncles.

Flower heads are of discoid.  Ray florets are lacking.  Disc florets are pink to magenta, bisexual and fertile.

Basal leaves are typically deciduous by flowering.  Stem leaves are in whorls of 3 or 4 leaves.  Leaves abruptly taper at base to short petioles, and are relatively firm, ovate, toothed, gland-dotted (undersides), slightly rough on upper faces.

Plants of moist places, especially in sandy or gravelly soil; inland along major rivers.  Flowers August to September.  Native.

 

 

Similar species:  other members of the genus Eutrochium.

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