Science magazines
- Pine Hill Ceanothus
- Pine Hill Flannelbush
- Pink Mucket Pearlymussel
- Piping Plover
- Pismo Clarkia
- Pitcher's Thistle
- Pitkin Marsh Lily
- Platanthera Holochila
- Plicate Rocksnail
- Plymouth Red-bellied Turtle
- Po'e
- Poa Siphonoglossa
- Point Arena Mountain Beaver
- Polystichum calderonense
- Pondberry
- Poo-uli
- Popolo 'aiakeakua
- Popolo Ku Mai
- Prairie Bush-clover
- Preble's Meadow Jumping Mouse