Polystichum tripteron ("Jumonjishida")

Japanese name: ジュウモンジシダ （十文字羊歯）
Scientific name: Polystichum tripteron

[Overview]
A terrestrial fern growing in dark, damp places in forests and along streams; it is evergreen in warm regions.
It often grows in colonies.
The rhizome is short, massive and erect, bearing leaves in tufts and scales.
The scales are ovate-oblong, about 1.3 cm long, pale brown, with a nearly entire or shallowly toothed margin.
The leaf stalk is 15–35 cm long, and its scales are ovate-lanceolate, membranous and easily shed.
The fronds are single-pinnate and lanceolate, 20–50 cm long, with the lowest pair of pinnae greatly developed.
The pinnules are triangular-narrowly elliptical, shallowly or moderately lobed, herbaceous and soft, with distinct veins and small scales on the underside.
The sori are scattered over the whole underside of the frond or in one row on each side of the midrib, and the indusium is small, round, irregularly toothed on the margin, and shed early.

[Cultivation]
It prefers partial shade to shade and a moderately moist place.

[Notes]
The Japanese name comes from the shape of the leaves.

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