P. alba

P. alba may refer to:
 * Plumeria alba, a large evergreen shrub species native from Central America and the Caribbean
 * Populus alba, the white poplar, a tree speciesnative from Spain and Morocco through central Europe to central Asia
 * Prenanthes alba, the white rattlesnake root, a plant species
 * Prosopis alba, the algarrobo blanco, a tree species found in Argentina
 * Pseudofumaria alba, the white corydalis, a plant species