Eutrochium Maculatum or

Eutrochium Maculatum or

Eutrochium Maculatum

This herbaceous perennial sometimes grows as high as 2 m (6 ft 7 in). Stems are sometimes completely purple, sometimes green with purple spots. One plant can produce numerous rose-purple flower heads in late summer, each head with 8-22 disc flowers but no ray flowers.3-6 feet tall unbranched native perennial plant bearing branched flower stalks at the top. Main stem is purple or purple-spotted, stout and round, often covered with fine white hairs. Whorls of 4 or 5 yellowish green leaves occur along the central stem Leaves up to 8 long and 2� across, ovate to narrowly ovate with serrated margins and conspicuous veins. Pink or purple flowers occur in flat-headed clusters several inches across containing 8-20 disk florets and no ray florets. Fruit an achene with hair-like bristles dispersed by the wind.



Plants 60–200 cm. Stems usually purple-spotted, sometimes uniformly purple, usually solid, sometimes hollow near bases, glabrous proximally to densely puberulent throughout, glandular-puberulent distally. Leaves in (3s–)4s–5s(–6s); petioles 5–20 mm, glabrous or pubescent; blades pinnately veined, lance-elliptic to lanceolate or lance-ovate, mostly (6–)8–23(–30) × (1.5–)2–7(–9) cm, bases gradually or abruptly tapered, margins sharply serrate or doubly serrate, abaxial faces gland-dotted and densely pubescent to glabrate, adaxial faces sparingly hairy or glabrous. Heads in flat-topped, corymbiform arrays. Involucres often purplish, 6.5–9 × 3.5–7 mm. Phyllaries glabrous or densely pubescent. Florets (8–)9–20(–22); corollas purplish, 4.5–7.5 mm. Cypselae 3–5 mm. 2n = 20.Eutrochium maculatum is an herbaceous native perennial wildflower, commonly known as Joe Pye Weed or Queen of the Meadow, that is useful as a tall plant in wet spaces. It displays clusters of purple blossoms through summer into fall.

Recently, species of Joe-Pye Weed have been separated from the Bonesets (Eupatorium spp.); they have been re-assigned to the genus Eutrochium. Some sources of information still refer to this species as Eupatorium maculatum, and sometimes it is also referred to as Eupatoriadelphus maculatus. In Illinois, species of Joe-Pye Weed differ from the Bonesets by their whorled leaves, while the latter group of plants usually have opposite leaves. Spotted Joe-Pye Weed (Eutrochium maculatum) differs from Hollow-stemmed Joe-Pye Weed (Eutrochium fistulosum) and Sweet Joe-Pye Weed (Eutrochium purpureum) by its rather flat-headed panicles of flowerheads, purple-spotted or purplish stems that are often pubescent, and flowerheads consisting of 8-20 disk florets. Other species of Joe-Pye Weed within the state have more dome-shaped panicles of flowerheads, stems that are hairless, and flowerheads consisting of 4-7 disk florets. Spotted Joe-Pye Weed also tends to be shorter. (Source: www.illinoiswildflowers.info)



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