The spider brake (Pteris multifida) belongs to the Pteridaceae family. It is an evergreen fern that is native to southward from southern Tohoku district of Honshu to Shikoku, Kyushu of Japan, as well as Taiwan, China and the Indo-China Peninsula. This fern grows in a place near human dwellings, and its height is 20-60 cm. The leaves are once pinnatly compound, of two types, the sterile fronds are 1 cm wide and the fertile fronds are slightly thin, about 5 mm wide. In both cases, the veins do not reach the frond edge. The sori are arranged in margins. It is similar to Cretan brake fern (Pteris cretica), but has distinctive winged rachis.