金平双盖蕨 jin ping shuang gai jue

Basionym: Allantodia jinpingensis W. M. Chu, Acta Bot. Yunnan. 3: 340. 1981.

Plants evergreen, medium-sized. Rhizome ascending, apex scaly; scales brown, lanceolate, ca. 6 mm, margin black, toothed, apex slightly curly; fronds caespitose. Fertile fronds 80-90 cm; stipe dark brown at base, upward light green, 25-30 cm, 2-3 mm in diam., base sparsely scaly, upward glabrous; lamina 1-pinnate with pinnatilobate pinnae, deltoid, 55-60 × 30-40 cm, apex acuminate; pinnae 5-8 pairs, ascending, lanceolate, up to ca. 23 × 4 cm, base asymmetrical with basal adaxial and abaxial lobes alternate, pinnatilobate to pinnatifid, apex long acuminate; basal pinnae subsimilar to and as long as upper pinnae, with stalk up to 2 cm; pinna lobes up to 15 pairs, ascending, broadly deltoid, margin shallowly crenate or shallowly repand, apex rounded; veins pinnate, veinlets up to 10 pairs, mostly simple or forked, ascending. Lamina papery when dry, green, glabrous adaxially; rachis, costa, and veins abaxially with thin small scales and multicellular short hairs. Sori linear, up to 8 pairs per lobe, from base upward to 1/2 of veinlet length, single or double on basic acroscopic veinlet; indusia brown, membranous, entire. Spores reniform, perispore with thickly anastomosing ornamentation.

● Forests; ca. 1900 m. SE Yunnan (Jinping).

Diplazium jinpingense is similar to a 1-pinnate-leaved D. dilatatum but differs by the scales lanceolate and apically acute (vs. linear-lanceolate and apically long linear) and by the perispore with thickly anastomosing ornamentation (vs. granular and few rugate).