"Enbi-senno" (Lychnis wilfordii) belongs to Caryophyllaceae (the Carnation family). It is a perennial herb that is distributed in Saitama and Nagano prefectures of Honshu, central and southern parts of Hokkaido in Japan, as well as the Korean Peninsula, northeastern China, and the Ussuri region. It grows in wetlands on hills and mountains, and is 40 to 80 cm tall. It produces vermilion-red flowers at the top of stems from July to August. There are five petals, and the tip is lobed like a swallow's tail. The Chinese name is "絲瓣剪秋羅" (si ban jian qiu luo).