Eutrochium dubium (Eupatorium d., Eupatoriadelphus dubius)|three-nerved joe-pye weed|Asteraceae

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.

Related Terms:

Term: Martin et al. 1951

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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);