C. maxima

C. maxima may refer to:


 * Canna maxima, a perennial plant
 * Cattleya maxima, a plant with a yellow stripe on its flower lip
 * Cecropia maxima, a plant endemic to Ecuador
 * Chrysoglossa maxima, a Central American moth
 * Citrus maxima, a plant native to Asia
 * Collocalia maxima, a cave-nesting swift
 * Coracina maxima, a bird endemic to Australia
 * Corylus maxima, an Old World hazel
 * Crocomela maxima, a Bolivian moth
 * Cucurbita maxima, a squash native to South America