Nearctica - Eastern Wildflowers - Asteraceae - Late-flowering Thoroughwort (Eupatorium serotinum)

Late-flowering Thoroughwort

(Eupatorium serotinum)

Color Photographs: Copyright Nearctica.com, Inc.

Line Drawing: Britton, N.L., and A. Brown. 1913. An Illustrated Flora of the Northern United States and Canada, Second Edition.

Ageratina altissima

Late-flowering Thoroughwort is most similar to White Snakeroot and both species have long, thin leaf petioles. However the leaves of White Snakeroot are heart-shaped, while those of Late-flowering Thoroughwort and much longer and thinner.

Late-flowering Thoroughwort (Eupatorium serotinum)

Identification: Flowers white and arranged in a flat-topped cluster. Leaves elongate with a long, thin petiole. Leaf margin dentate. Plant 4 to 8 feet in height.

Distribution: Minnesota in the west to New England in the east, southward to Florida and Texas.

Habitat: Wet woods and clearings, and low thickets.

Flowering period: September to October.

Late-flowering Thoroughwort (Eupatorium serotinum)

Similar Species:

White Snakeroot (Ageratina altissima)

Similar Species