ユリ科ギボウシ属の多年草で、学名は Hosta rectifolia (syn. Hosta sieboldii var. rectifolia)。英名はありません。
The "Tachi-giboushi" (Hosta rectifolia) belongs to Liliaceae (the Lily family). It is a perennial herb that is distributed northward from Chubu district of Honshu to Hokkaido, as well as the southern Kuril Islands, Sakhalin and Siberia. This herb grows in flatland to sub-alpine bogs or grasslands, and can reach 60-100 cm in height. The leaves are oblong with long petioles and undulate edges. The pale purple to dark purple flowers bloom on the long flowering stalks from July to August. The young shoots are used for wild vegetable, boiled green or marinated food of vinegared bean paste. It is defined by striking purple-brown flowering stalks. It is similar to "Koba-giboshi" (Hosta albo-marginata), but it has long leaf stalks and large leaf blades.