峨眉对囊蕨 e mei dui nang jue

Athyriopsis omeiensis Z. R. Wang, Acta Phytotax. Sin. 20: 236. 1982.

Rhizome erect, ca. 1.2 cm in diam. including remaining stipe bases, apex like stipe base with sparse brown, ovate-lanceolate scales; frond caespitose. Fertile frond 28-38 cm; stipe 13-21 cm, 1-1.5 mm in diam.; lamina narrowly ovate, 12-19 × 7-10 cm, base subtruncate, apex acuminate; pinnae 7-9 pairs, subspreading, sessile, basal 1 or 2 pairs opposite, reduced, symmetrical; middle pinnae alternate, narrowly oblong or lanceolate, 3-5 × 1-1.8 cm, base truncate, pinnatipartite, apex acute; pinna lobes 6-9 pairs, spreading, suboblong, contiguous, 7-9 × 3-8 mm, margin crenate or subentire, apex subtruncate; veins pinnate, veinlets simple, 3 or 4 pairs per pinna lobe, oblique. Lamina thinly herbaceous, dark green when dry, both sides of rachis, costae, and veins with sparse light brown, curly short nodose hairs. Sori linear or oblong, 1-3 pairs per lobe, single or double on basic acroscopic veinlets; indusia dark brown, thickly membranous, margin not incurved, lacerate, ciliate. Spores semicircular in polar view, perispore surface with sparse auriculate flake-shaped and obtuse aculeate irregular projections.

● Deep valleys; ca. 2000 m. Sichuan (Emei Shan).