"Yakushima-iwakinbai" (Potentilla sp.) belongs to Rosaceae (the Rose family). It is a perennial herb that is native to Yakushima, Kyushu in Japan. The usual "Iwaki-kinbai" is 10 to 20 cm high, but this is only about 4 to 5 cm. The basal leaves are thick, shiny and waxy. The flower stalks are stretched and bright yellow flowers bloom one after another. As a variety, it seems that it has not been confirmed. Also, according to Ken Sato, despite being the same species as "Iwaki-kinbai" that grows in various parts of Japan, it is sold with increased horticultural value by bearing the world heritage Yakushima, which is the southern limit of its distribution. It is said that there is.