Eutrochium dubium  (Eupatorium d., Eupatoriadelphus dubius) three-nerved joe-pye weed Asteraceae EUDU; Bx, pb(DeCandido 2001); Q f, j; K, p; R (DeCandido 2001);

    

eutrochium-dubium-copyright-david-g-smith-delawarewildflowers-org

Eutrochium dubium.Copyright David G. Smith.delawarewildflowers.org (Accessed 1/2017).

Eutrochium dubium is a perennial herb, 40-100 cm tall, stem with purple speckles, sticky-hairy near top. 

Leaves in whorls of 3-4, short-stalked, blade 5-12 cm long, 2-7 cm wide, thick, egg-shaped, tip pointed, base abruptly contracted, margin coarsely toothed, strongly 3-veined. 

Flowers dull purple 5-8 per head, no rays, basal bracts narrow, in several rows; inflorescence dense, convex, not large; blooms July-Sept. 

Fruit dry, 1-seeded, 5-angled plumed achene about 0.4 cm long. Eaten by some birds (Martin et al. 1951). 

Wetland status: FACW. 

Frequency in NYC: Infrequent. 

Origin: Native. 

Habitat: Open, wet areas, prefers acid soil.