The Frost grass (Spodiopogon sibiricus) belongs to Poaceae (the Grass family). It is a perennial herb that is native to throughout Japan, the Korean Peninsula, China and eastern Siberia. This grass grows in sunny, montane grasslands and it can reach 1-1.2 m in height. The leaves are linear, 20-90 cm long, and bear sparsely short hairs on adverse sides. The conical spikes bear upright atop of stems, and bloom purplish-brown flowers from summer to fall. The Japanese name is derived from "rough" + "Abura-susuki".