You searched for: Place Greenstone Ridge, within 2 mi of Windigo; Isle Royale National Park Remove constraint Place: Greenstone Ridge, within 2 mi of Windigo; Isle Royale National Park Place Michigan Remove constraint Place: Michigan Place USA Remove constraint Place: USA Topic Ophioglossaceae Remove constraint Topic: Ophioglossaceae Topic Polypodiopsida Remove constraint Topic: Polypodiopsida Type still image Remove constraint Type: still image