|
 |
White Snakeroot (Ageratina altissima) |
|
Eupatorium serotinum The leaves of Late-flowering Thoroughwort have elongate leaf petioles, but the leaves are much narrower than those of White Snakeroot.
Eupatorium pilosum The leaves of Hairy Thoroughwort, Round-leaved Thoroughwort, Boneset, and Upland Boneset all lack leaf petioles.
Eupatorium rotundifolium The leaves of Hairy Thoroughwort, Round-leaved Thoroughwort, Boneset, and Upland Boneset all lack leaf petioles.
Eupatorium perfoliatum The leaves of Hairy Thoroughwort, Round-leaved Thoroughwort, Boneset, and Upland Boneset all lack leaf petioles.
Eupatorium sessilifolium The leaves of Hairy Thoroughwort, Round-leaved Thoroughwort, Boneset, and Upland Boneset all lack leaf petioles. White Snakeroot (Ageratina altissima) Identification: Flowers white arranged in a flat-topped cluster. Leaves heart-shaped, with a sharp, apical point, and a square base. Leaf margins toothed and petioles thin and elongate. Distribution: North Dakota in the west to New Brunswick in the east, southward to Florida and Texas. Habitat: White Snakeroot is found in rich woods and thickets. Flowering period: July to October. Comment: Eupatorium rugosum has been used as the scientific name for this species. |
White Snakeroot (Ageratina altissima)
Similar Species: Late-flowering Thoroughwort (Eupatorium serotinum) Hairy Thoroughwort (Eupatorium pilosum) Round-leaved Thoroughwort (Eupatorium rotudifolium) Boneset (Eupatorium perfoliatum) Upland Boneset (Eupatorium sessilifolium)
|
Similar Species |
 |
