E. flavescens may refer to:
Echeandia flavescens, a herbaceous plant Echinocardium flavescens, a heart urchin Eicherax flavescens, a robber fly Eimeria flavescens, an apicomplexan parasite Elachista flavescens, a European moth Eleutherodactylus flavescens, a frog endemic to the Dominican Republic Elisolimax flavescens, a land snail Elleanthus flavescens, a flowering plant Empidonax flavescens, a tyrant flycatcher Empoasca flavescens, a green leafhopper Enneapogon flavescens, an Australian grass Eptesicus flavescens, a vesper bat Eria flavescens, a flowering plant Erebomaster flavescens, a daddy longlegs Eublemma flavescens, an owlet moth Eucalyptus flavescens, a flowering plant Eulaema flavescens, a euglossine bee Eumecynostomum flavescens, an acoelomorph worm Eurycorypha flavescens, a bush cricket Exorista flavescens, a Palearctic fly