You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place USA Remove constraint Place: USA Place Wasson PK, Tucson Mts Remove constraint Place: Wasson PK, Tucson Mts Topic Astrolepis Remove constraint Topic: Astrolepis Topic Pteridaceae Remove constraint Topic: Pteridaceae