Oreostylidium subulatum is a very small, cæspitose, and densely tufted plant about 2–3 cm tall. The 2 cm long linear-subulate leaves form a basal rosette close to the ground.
A small, dense, and tufted plant, Oreostylidium subulatum reaches a height of about 2–3 cm. Its linear, pointed leaves are arranged in a basal rosette close to the soil surface.