You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Feldtman Ridge, slopes of; below Feldtman Tower Remove constraint Place: Feldtman Ridge, slopes of; below Feldtman Tower Place Keweenaw Remove constraint Place: Keweenaw Place USA Remove constraint Place: USA Topic Equisetaceae Remove constraint Topic: Equisetaceae Topic Equisetum Remove constraint Topic: Equisetum