P. rex
# P. rex

P. rex may refer to:

* Papilio rex, the regal swallowtail, a butterfly species found in Africa
* Pedicularis rex, a plant related to lousewort
* Percina rex, the Roanoke logperch, a small freshwater fish species found in the Roanoke and Chowan drainages
* Pseudoeurycea rex, a salamander species found mostly in Guatemala and Mexico
