Japanese name: ハリガネワラビ（針金蕨） Scientific name:Thelypteris japonica
A summer-green fern commonly seen in woods in hills, low mountains and satoyama (woodland near villages).
The rhizome is short, creeping horizontally or ascending, with hairs and dark brown scales.
The fronds are twice pinnately deeply divided, triangular-oblong, 25–40 cm long and 15–25 cm wide.
The pinnae are cut to a depth of about 5/6 and narrow toward the base.
The lowest pinnae are attached pointing slightly downward.
The axes of the frond and the frond margins have hairs.
The rachis is reddish brown.
The sori are borne near the margin, and the indusium is large and round-reniform.
The stipe is 30–50 cm long and reddish brown, with few hairs if any.
The base of the stipe is glossy blackish brown and has dark brown scales.
The spore surface has reticulate ridges.
