1. Yellow-green fern of rocky areas of northern hemisphere
   - limestone fern, northern oak fern

Type of: fern

• islands of Langerhans
• islay
• isle
• Isle of Jura
• Isle of Man
• Isle of Skye
• Isle of Wight
• Isle Royal National Park
• isles of Langerhans
• Isles of Scilly
• islet
• islets of Langerhans
• ism
• Ismaili
• Ismailian
• Ismailism
• ISN
• isn't
• iso-
• isoagglutination
• isoagglutinin
• isoagglutinogen
• isoantibody
• isobar
• isobaric