Aster scaber Thunb. [Asteraceae]
Shirayamagiku (シラヤマギク, 白山菊)
Lifeform: perennial forb
Distribution: China - Korea - Japan
Habitat: woodlands and thickets in hills and low mountains
Seed dispersal: wind
Aster scaber in Hokkaido

Near Muroran Marine Station on August 20 2007.
Aster scaber on Mount Usu
In the crater basin on September 19 2008. The defoliation began.