Hypodematium laxum Ching ex He.

Plants 22-40 cm tall. Rhizomes creeping, slender, densely scaly together with swollen stipe base; scales reddish brown, lustrous, lanceolate, 5-15 × 1-3 mm, membranous. Fronds approximate; stipe 8-19 cm × 1-2 mm, glabrous or sometimes sparsely grayish white hairy; lamina triangular-ovate, 14-20 × 8-14 cm, herbaceous, abaxially densely covered with grayish white long hairs, adaxially glabrous or sparsely hairy along veins, 3-pinnate-pinnatifid at base, acuminate and pinnatifid at apex; costae and costules with same hairs as frond and mixed with short, golden glandular hairs; pinnae 8-12 pairs, oblique, basal pair largest, triangular-lanceolate, 7.5-14 × 3.5-6 cm, base truncate, with a 1-2 cm stalk, 2-pinnate-pinnatifid, apex shortly acuminate; pinnules ca. 10 pairs, anadromous, alternate, oblique, shortly stalked, acroscopic ones smaller, proximal basiscopic pair largest, triangular-lanceolate, 3.5-4.5 × 1.2-2.5 cm, shortly stalked, base truncate, 1-pinnate-pinnatifid, apex obtuse; ultimate pinnules 6-8 pairs, oblong, 6-15 × 5-10 mm, base decurrent, pinnatifid; segments oblong, base broadly truncate, entire or with a few crenations, apex obtuse. Veins obvious on both surfaces, pinnate, ending at margin. Sori orbicular, 1-3 per segment, at middle of veinlets; indusia grayish brown, reniform, medium-sized, sparsely hairy. Spores ellipsoid, bearing inflated folds, with granular ornaments.

● Rock crevices in valleys; 300-1000 m. Anhui, Hebei, Henan, Hunan, Jiangxi, Shaanxi, Shandong, Zhejiang.