P. americana

P. americana may refer to:


 * Paradelphomyia americana, a crane fly species in the genus Paradelphomyia
 * Periplaneta americana, the American cockroach, palmetto bug or waterbug
 * Persea americana, the avocado, aguacate, palta, butter pear or alligator pear tree
 * Pilularia americana, the American pillwort, an aquatic fern species
 * Prunus americana, a species of plum tree
 * Phytolacca americana