Drosera x sidjamesii is a natural hybrid between D. pulchella and D. patens. The pygmy sundew is named in honour of Professor Sid James from UWA.

The hybrid represents a morphological midpoint between its two parent species. The leaf shape is similar to Drosera pulchella, albeit with narrower petioles. The laminae are roughly orbicular and the petioles are dilated towards the middle. The number of leaves is much greater than D. pulchella. The flowers are more similar to D. patens, featuring large, red, club-shaped styles.

D. x sidjamesii is found on the shores of a few lakes north of Perth The species grows in silica sand in habitat stabilised by sedges.