Thelypteris viridifrons ("Midorihimewarabi")

Japanese name: ミドリヒメワラビ （緑姫蕨）
Scientific name: Thelypteris viridifrons

[Overview]
A summer-green fern found along roadsides and in woods near human settlements.
The rhizome is short and ascending, with hairs and brown scales.
The fronds are three times pinnately deeply divided or compound, broadly ovate-oblong, 30–50 cm long, and bright green.
The pinnae have stalks.
The pinnules are sparsely arranged, broadly lanceolate to triangular-oblong, up to 3 cm wide, with a nearly truncate, symmetrical base and a short stalk.
The lateral veins do not reach the margin.
The pinnule axes have narrow wings.
The sori are borne midway between the margin and the midrib, and the indusium is small, round-reniform, and hairy.
The stipe is 30–50 cm long and straw-colored, with hairs and brown scales at the base.
The spore surface has reticulate ridges.

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