Singer 1943 Tephrocybe rancida is a species of fungus in the family Lyophyllaceae.

It was first described by Swedish mycologist Elias Magnus Fries in 1821.

Grey to brown-grey starting with a whitish bloom.

Stem 4–8 cm long by 3–7 mm in diameter, concolorous with cap.

Spores white or cream, ellipsoid, 7–8 × 3–4.5 m. Found growing from the ground, solitary in deciduous woodland.