Creamy white terminal clusters of 5-petalled flowers bloom in early summer. Twinflower is a low creeping, mat-forming plant with delicate twin bell flowers. Small rounded leaves are opposite along the trailing stem. Single or branched stems are marked with indentations from the start of annual growth. The evergreen bristly leaves are narrow and grow in semi-whorls around the stem.
Reproduction is by spores.
The yellowish strobilus is slim and pointed and is on a short stalk terminating the stem. Height is about 15cm. One site only has been found - just off the alternate Games Trail route near the Chaulk's Run intersection. This creeping clubmoss grows in untidy, tangled masses. Leaves are tiny and grown together to create a smooth surface along irregularly branched flattened branches.