Drosera trichocaulis is a pygmy sundew endemic to the south coast of Western Australia. I observed the plants growing in the Manypeaks area and Fitzgerald River National Park where inhabits the sandy laterite based understory of heathland. The species lies flat along the ground and has thin petioles and orbicular laminae. It can be distinguished from other similar looking species by its inflorescece, which is entirely covered in long wooly non-glandular hairs.