C. flavescens may refer to:
Callista flavescens, a tropical orchid Caloplaca flavescens, a crustose lichen Calytrix flavescens, a shrub endemic to Australia Camponotus flavescens, a carpenter ant Canna flavescens, a garden plant Catocala flavescens, an Indian moth Celeus flavescens, a South American woodpecker Cephalostachyum flavescens, an Asian bamboo Ceratostylis flavescens, a flowering plant Chaetobranchus flavescens, a South American fish Chamaesciadium flavescens, a flowering plant Charaphloeus flavescens, a lined flat bark beetle Chemnitzia flavescens, a sea snail Chionochloa flavescens, a tussock grass Chira flavescens, a jumping spider Clathrus flavescens, a saprobic stinkhorn Cleistanthus flavescens, a near threatened plant Cnidocampa flavescens, an Asian moth Cnodalia flavescens, an orb-weaver spider Coccophagus flavescens, a chalcid wasp Conioscinella flavescens, a grass fly Conus flavescens, a sea snail Cormocephalus flavescens, a large centipede Corymbia flavescens, a dicotyledon plant Corynebacterium flavescens, a rod-shaped bacterium Coryphopterus flavescens, a goby native to the eastern Atlantic Ocean Creagrutus flavescens, a South American characin Cresponea flavescens, a lichenized fungus Crocidura flavescens, a white-toothed shrew Cryptococcus flavescens, a dimorphic fungus Cyperus flavescens, a papyrus sedge Cypripedium flavescens, a lady's slipper orchid Cyrtopodium flavescens, a flowering plant