Science magazines
- Palo de Ramón
- Palo de Rosa
- Palos Verdes Blue Butterfly
- Pamakani
- Pamakani
- Papery Whitlow-wort
- Parish's Daisy
- Pauoa
- Pawnee Montane Skipper
- Peck's Cave Amphipod
- Pecos Bluntnose Shiner
- Pecos Gambusia
- Pecos Sunflower
- Pedate Checker-mallow
- Peebles Navajo Cactus
- Peirson's Milk-vetch
- Pelos del Diablo
- Pendant Kihi Fern
- Peninsular Bighorn Sheep
- Penland Alpine Fen Mustard