The "Fushiguro-senno" (Lychnis miqueliana) belongs to Caryophyllaceae (the Carnation family). It is a perennial herb that is endemic to Japan and distributed to Honshu, Shikoku and Kyushu. This herb grows in mountains and can reach 40-80 cm in height. The stem is erect and has swollen nodes which tinged purplish-black. The leaves are obovate to elliptic-lanceolate and opposite. The flowering stalks are borne on the stem apices and bloom vermillion-red flowers from July to October. The five petals open flat. The Japanese name is derived from the purple-black, slightly bulging node.