Etymology Amurensis refers to the area of the Amur River, which is the boundry between Manchuria and Russia.

Description Rhizome: short-creeping, scales.
Frond: 50 cm high by 20 cm wide, evergreen, monomorphic, blade/stipe ratio: 2:3.
Stipe: grooved, darker base, scales sparse, ovate, long, pale brown, vascular bundles: 3-7 in a c-shaped pattern.
Blade: 3-pinnate at base, pentagonal, membranous, small bullate scales on underside.
Pinnae: anadromous, the lowest pinnae almost the size of the remainder of the blade; pinnules basiscopic pinnule of lowest pinnae very long; costae grooved above, continuous from rachis to costae; segments oblong-ovate; margins pinnately incised or lobed, soft-spiny; veins free, forked.
Sori: round, medial on lobes, on upper half of lower veinlets, indusium: reniform, at a sinus, sporangia: brownish.

Culture Habitat: on humus-rich floor of dense mountain, coniferous forests often in subalpine zone. Distribution: eastern Siberia, northeastern China, Japan, Korea. Hardy to -30�C, USDA Zone 4.

Synonyms
Aspidium spinulosum var. amurense Milde
Leptorumohra amurensis (Christ) Tzvelev
Nephrodium amurense B. Fedtschenko