N
- Naked Broom Rape (3)
- Naolinco, Veracruz, Mexico (1)
- Narada Falls (2)
- Narrow Leaf Cottonwood (3)
- The Narrows (4)
- Nasturtium (1)
- National Park Inn (2)
- Natural bridges (2)
- Naturalists (1)
- Naushon Island (2)
- Navel Orange (1)
- Nawiliwili Bay (2)
- Nelumbium luteum (1)
- Nelumbium (2)
- Nelumbo lutea (5)
- Nelumbo (6)
- Nephrolepis (2)
- Nest building (3)
- Net Leaf Oak (1)
- Nevada Fall (2)
- New Jersey Tea (1)
- New Mexico Locust (1)
- New Port State Park (5)
- New York Botanical Garden (3)
- Newhall Ravine (2)
- Newport (1)
- Newspapers (1)
- Newtons Woods (4)
- Nichols, George E. (George Elwood), 1882-1939 (7)
- Niobrara River (2)
- Nipple Cactus (1)
- Nisqually Glacier (11)
- Nodding Wakerobin (2)
- Nodding Wild Rye (1)
- Nolina (8)
- Norland (1)
- North Basin (2)
- North Manitou Island (56)
- Northern Bedstraw (1)
- Northern California Coast (1)
- Northern Catalpa (5)
- Northern Green Orchid (1)
- Northern Mules Ears (2)
- Northern Red Oak (19)
- Northern White Oak (17)
- Norton Creek (1)
- Notchtop Mountain (1)
- Nothocestrum (2)
- Nuuana Valley (2)
- Nymphaea advena (1)
- Nymphaea polysepala (2)
- Nymphaea sagittifolia (1)
- Nymphaea (15)
- Nyssa aquatica (1)
- Nyssa sylvatica (7)
- Nyssa (10)