Cassiope lycopodioides, Haida Gwaii mountain-heather or clubmoss mountain heather, is a plant species native to southern Alaska, British Columbia, and the US State of Washington. It is found on rocky slopes in arctic and alpine tundra at elevations up to 2000 m. In Washington, it is reported only from King County. The specific epithet "lycopodioides" refers to the plant's superficial resemblance to some species of clubmoss (Lycopodium sensu lato).Cassiope lycopodioides subsp.