P. grandis may refer to: Pachycereus grandis, a large cactus species in the genus Pachycereus native to Mexico and just into southern Arizona, United States Peromyscus grandis, the big deer mouse, a rodent species found only in Guatemala Phasia grandis, a fly species in the genus Phasia Pinanga grandis, a flowering plant species in the genus Pinanga Pisonia grandis, a flowering tree species distributed throughout the coral cays of the Indian and Pacific Oceans Pleurobranchus grandis, a marine sidegill slug species Ploceus grandis, the giant weaver, a bird species endemic to São Tomé and Príncipe Promynoglenes grandis, a spider species in the genus Promynoglenes endemic to New Zealand
Synonyms Paphinia grandis, a synonym for Paphinia grandiflora, an orchid species native to Brazil Pritchardia grandis, a synonym for Licuala grandis, a palm species
See also Grandis (disambiguation)