Above: Tall Boneset next to bike path pavillion in Verona, Wisconsin on September 7, 2020.
Tall Boneset - Eupatorium altissimum
Tall Boneset is a native plant that grows from 3'- 6 1/2' tall in woods, thickets, savannas and glades.
The plant produces a large number of small white flower heads in a large flat-topped array at the top of the plant. The individual white flowers are about 1/8" wide and are star-shaped with 5 triangular petal-like lobes. In the center there is a brown column with long, string-like, white stamens.
Other names: Tall eupatorium, Tall thoroughwort, Upland boneset.
Tall Boneset blooms July-Sept.
Above: Tall Boneset stem next to bike path pavillion in Verona, Wisconsin. (9/07/20)
Tall Boneset flowers resemble those of both Common boneset (Eupatorium perfoliatum) and False boneset (Brickellia eupatorioides); however, the plants can be distinguished from each other by their leaves. Of the three, Tall Boneset is most similar in appearance to False Boneset (Brickellia eupatorioides). (See photos below)
Above: False Boneset flowers (l) vs. Tall Boneset flowers (c) and Common Boneset flowers (r).
Above: False Boneset leaves (l) vs. Tall Boneset leaves (c) and Common Boneset leaves (r).
For more information on Tall Boneset, visit Wikipedia.
Or, for information on Tall Boneset (Eupatorium altissimum) visit the: Wisconsin State Herbarium.
Above: Tall Boneset in the Prairie Moraine Dog Park in Verona, Wisconsin. (9/10/23)
Above: Tall Boneset next to bike path pavillion in Verona, Wisconsin. (9/07/20)
Above: "Tall Boneset in UW Arboretum gardens in Madison, Wisconsin. (8/16/22)
Above: Tall Boneset specimen collected in Jefferson County in the Blue Springs Oak Opening State Natural Area on September 22, 1989.
Above: 1913 Tall Boneset illustration.
Above: Common Boneset on shore of Lake Wingra on Arboretum Drive in Madison, Wisconsin. (9/2/21)
Above: False Boneset near the UW Arboretum Visitor Center in Madison, Wisconsin. (8/09/23)