"Ukon-isomatsu" (Limonium wrightii var. wrightii) belongs to Plumbaginaceae (the Plumbago family). It is a shrub that is native to the Izu Islands, the Ogasawara Isands, the Amami Island and the Ryukyu Islands, as well as the Ransho Islands in Taiwan. This shrub grows on limestone rocky shore, and it can reach 10-30 cm in height. The leaves are spatulate, entire with round tips, and arranged in rosette. The flowering stalks are borne and the yellow, pink, white or pale yellow flowers bloom in the panicles from August to November. The corolla is tubular and five partite. The Japanese name is derived that the stems after defoliation resemble to the pine stems.