Continuing the countdown of invasive species here on Beaver Island…
European swamp thistle.
Marsh plume thistle.
Many names for yet another invasive plant species.
This one has been described, “like purple loosestrife, with spines.”
Marsh Thistle is a member of the Aster family with origins in Europe.
It is an erect herbaceous biennial that can grow 3 to 5 feet in height. Once again, I go to the informative brochure, Top Ten Invasive Species, put out by the Beaver Island Association for their excellent description:
[Marsh Thistle]has a rosette (circle) of leaves at the base that are long, spiny, and deeply lobed. The stem is thick, often reddish, and covered with hairy spines and equally spiny, hairy leaves. The pinkish-purple flowers appear at the top of the stem in a tight cluster, usually in June or July. On Beaver Island this plant is more likely to be found in moist areas than in dry sand.
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