You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Mississippi Remove constraint Place: Mississippi Place USA Remove constraint Place: USA Place Washington Remove constraint Place: Washington Place Yazoo Natl. Wildlife Refuge, natural levee between Alligator Pond & Swann Lake Slough. Remove constraint Place: Yazoo Natl. Wildlife Refuge, natural levee between Alligator Pond & Swann Lake Slough.