https://minnesotawildflowers.info/flower/grand-redstem
Ammannia robusta (Grand Redstem): Minnesota Wildflowers
Photos and information about Minnesota flora - Grand Redstem: clusters of 1 to 3, ΒΌ-inch, 4-petaled pink to lavender flowers in leaf axils
ammannia robustagrand redstemminnesota wildflowers