Ervum tetraspermum)[1] the smooth tare, smooth vetch, lentil vetch or sparrow vetch, is a species of flowering plant in the bean family Fabaceae.

Vicia tetrasperma is an annual plant growing up to 60 cm (24 in) tall.

The leaflets are 10 to 20 mm (0.39 to 0.79 in) and are in four to six pairs, the leaf ending with a simple tendril.

Four seeds are produced in a pod 12 to 15 mm (0.47 to 0.59 in) long.

This vetch is native to Europe, Asia, and North Africa, and it can be found on other continents as an introduced species.