Science magazines
- Presidio Clarkia
- Presidio Manzanita
- Price's Potato-bean
- Pteris Lidgatei
- Pu'uka'a
- Pua'ala
- Puerto Rican Boa
- Puerto Rican Broad-winged Hawk
- Puerto Rican Crested Toad
- Puerto Rican Nightjar
- Puerto Rican Parrot
- Puerto Rican Plain Pigeon
- Puerto Rican Sharp-shinned Hawk
- Puritan Tiger Beetle
- Purple Amole
- Purple Bankclimber
- Purple Bean
- Pygmy Fringe-tree
- Pygmy Madtom
- Pygmy Sculpin