C. darwinii

C. darwinii may refer to:


 * Caberea darwinii
 * Calceolaria darwinii, a perennial plant originally from Tierra del Fuego in the southern part of South America
 * Camponotus darwinii, Forel, 1886, a carpenter ant species in the genus Camponotus
 * Carex darwinii
 * Cladonia darwinii
 * Cosmocalanus darwinii
 * Cyttaria darwinii, the type species of Cyttaria, a genus of ascomycete fungi