The Canadian hawkweed (Hieracium umbellatum) belongs to Asteraceae (the Aster family). It is a perennial herb that is widely distributed throughout Japan, Taiwan, the Korean Peninsula, and the Northern Hemisphere. It grows in sunny grassland in mountainous areas and coastal areas, and grows 30 to 120 cm tall. The leaves are oblong-lanceolate and alternate, with sparsely serrate or entire margins. Yellow flower-heads, 25 to 35 mm in diameter, bloom at the top of the stem from August to September. The flower-head is the only bisexual ray flower. The bracts are bell-shaped with 3 or 4 rows of involucre bracts. The fruit is a dark brown, cylindrical, achene with pappus. In Taiwanese Chinese, it is "ãÔRöe".