T. flavescens may refer to:
Tabebuia flavescens, a Brazilian evergreen tree Terebra flavescens, a sea snail Tetanops flavescens, a picture-winged fly Tetramoera flavescens, a tortrix moth Tetrathemis flavescens, a dragonfly first described in 1889 Thanatus flavescens, a false crab spider Thereva flavescens, a stiletto fly Tipula flavescens, a crane fly Tithaeus flavescens, a Bornean harvestman Tithorea flavescens, a milkweed butterfly Titiotus flavescens, a tengellid spider Torodora flavescens, a long-horned moth Trichophyton flavescens, a sac fungus Trisetum flavescens, a true grass Tubercularia flavescens, a sac fungus Turbonilla flavescens, a sea snail Turuptiana flavescens, a South American moth Tytthus flavescens, a carnivorous insect