Science magazines
- Penland Beardtongue
- Pennell's Bird's-beak
- Perdido Key Beach Mouse
- Persistent Trillium
- Peter's Mountain Mallow
- Phyllostegia Glabra Var. Lanaiensis
- Phyllostegia Hirsuta
- Phyllostegia Kaalaensis
- Phyllostegia Knudsenii
- Phyllostegia Mannii
- Phyllostegia Mollis
- Phyllostegia Parviflora
- Phyllostegia Velutina
- Phyllostegia Waimeae
- Phyllostegia Warshaueri
- Phyllostegia Wawrana
- Pigeon Wings
- Pilo
- Pima Pineapple Cactus
- Pinabete