Khaosokia caricoides is a robust, tussocky, rhizomatous, dioecious perennial with erect to drooping flowering stems.
It has many crowded, drooping, narrow leaves. The inflorescence is either wholly male or female, and has the following characteristics:
DNA sequencing studies suggest the plant is closely related to genera such as Carex (true sedges), Eriophorum (cotton grasses) and Trichophorum (deer grasses). It is also related to the North American genus Dulichium.