You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Isle Royale National Park One colony in Benson Creek where it crosses Daisy Farm Trail. T66N R34W SW1/4 sec. 22. Remove constraint Place: Isle Royale National Park One colony in Benson Creek where it crosses Daisy Farm Trail. T66N R34W SW1/4 sec. 22. Place Keweenaw Remove constraint Place: Keweenaw Place Michigan Remove constraint Place: Michigan Place North America Remove constraint Place: North America Topic Alismatales Remove constraint Topic: Alismatales Topic Potamogeton Remove constraint Topic: Potamogeton