C. grandis

C. grandis may refer to:
 * Calomyscus grandis, the noble calomyscus, a mouse-like hamster species from Iran
 * Calyptranthes grandis, a flowering plant species in the genus Calyptranthes
 * Camarasaurus grandis, a dinosaur species
 * Cantuaria grandis, a spider species in the genus Cantuaria found in New Zealand
 * Capparis grandis, a flowering plant species in the genus Capparis
 * Cassia grandis, the pink shower cassia, a plant species
 * Cattleya grandis, the large laelia, an orchid species in the genus Cattleya found in Brazil
 * Cephenemyia grandis, a botfly species in the genus Cephenemyia
 * Chionodes grandis, a moth species in the genus Chionodes
 * Chrysichthys grandis, the kukumai, a fish species found in Africa
 * Chrysopilus grandis, a snipe fly species in the genus Chrysopilus
 * Citrus grandis, the pomelo, a fruit plant native to Southeast Asia
 * Clidicus grandis, a rove beetle species in the genus Clidicus
 * Coccinia grandis, the ivy gourd, a tropical vine species
 * Copablepharon grandis, the pale yellow dune moth, a moth species found in North America
 * Coryphagrion grandis, a damselfly species found in Kenya, Tanzania and Mozambique
 * Cricosaurus grandis, an extinct marine crocodyliform species from the Late Jurassic of England, France, Switzerland, Germany, Argentina, Cuba and Mexico
 * Criorhina grandis, a hoverfly species in the genus Criorhina
 * Crocidura grandis, the greater Mindanao shrew, a mammal species endemic to the Philippines
 * Crossodactylus grandis, a frog species endemic to Brazil
 * Cryptocarya grandis, the cinnamon laurel, a plant species in the genus Cryptocarya found in Australia
 * Cymbospondylus grandis, a basal early ichthyosaur species from the middle and later years of the Triassic period found in Germany and Nevada