Drosera sargentii is a pygmy sundew especially known for its long, thin stipular bud.

Drosera sargentii is a small plant, growing rosettes of around 1.5 cm in diameter. The petioles are very thin and terminate with a spoon shaped lamina. The stipules at the base of the leaves are long and whispy, and often as long as the leaves. Together, they form an attractive fluffy bud at the centre of the plant.

The species grows along the south coast of Western Australia from the east of Esperance to the Fitzgerald River National Park. It is associated with fine white sand in coastal heathland habitats. The leaves of D. sargentii are somewhat similar to those of D. pygmaea, D. australis and other small flat sundews which share its range. It can be distinguished by its distinctively long and thin stipules, which are more compact in the other species.