Drosera hamiltonii is a species that is endemic to the southern coast of Western Australia. It inhabits swamps that straddle the south coast. The plants are usually found in the sloped terrain at the periphery of the swamps where water seeps out of the ground, and is often sympatric with Cephalotus. It is most commonly observed after fire has cleared the thick growth in the habitat.

The species grows a rosette of thin broad leaves that lie flat on the ground, attaining a vibrant red coloration in good sun. It is distinguishable from other Australian species in the way its leaves seem to ‘roll out’ as they unfurl. Its pink flowers are completely unique within the genus for having fused styles. For this reason, the species is elevated to its own subgenus – Drosera subg. Stelogyne.