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Lake Huron Tansy (Tanacetum huronense)
Lake Huron tansy is a threatened plant of the coastal dunes, occurring on the
northern shores of Lakes Michigan and Huron and the Lake Superior shoreline.
This large headed tansy, which also occurs in northeastern North America, has
lacy, hairy leaves and bright yellow, virtually ray less flower heads that
emerge in mid to late summer. Like the common garden tansy, which can be
distinguished by its much smaller flower heads and nonhairy leaves, all parts of
the plant have a very characteristic pungent odor when crushed.