Drosera erythrorhiza is a species of tuberous rosetted sundew that is widespread in the coastal south west of Western Australia. It is a variable species the grows in an wide range of habitats, inluding heathland, woodland and on granite outcrops. It is the type species of the Drosera erythrorhiza complex.

Compared to its close relatives, the plants are relatively small and reach a maximum diameter of around 5-8 centimeters. It typically grows 3-5 leaves, which appear almost circular in shape when emerging from the rosette. The species has a propensity to form dense clonal colonies, although this habit is not present at all locations.