阔羽双盖蕨 kuo yu shuang gai jue

Basionym: Allantodia latipinnula Ching & W. M. Chu, Fl. Xizang. 1: 150. 1983.

Plants large. Fertile frond up to 2 m; lamina 2-pinnate with pinnatilobate pinnules; rachis to 1 cm in diam.; pinnae alternate, ascending, middle pinnae broadly oblong-lanceolate, up to 80 × 30 cm, base slightly narrowed, with stalk up to 3 cm, apex acuminate; pinnules up to ca. 15 pairs, subspreading, basal pinnules slightly reduced, oblong-lanceolate, up to 17 × 5 cm, base truncate, slightly asymmetrical (acroscopic lobes smaller), subsessile, pinnatifid to pinnatipartite, apex acuminate; pinnule lobes up to 18 pairs, oblong, subspreading, margin crenate, apex rounded; veins visible abaxially, inconspicuous adaxially, veinlets up to 12 pairs per pinnule lobe, forked or simple, basal veinlets curved, not forked, basal basiscopic veinlet running to sinus between pinnule lobes, basal acroscopic veinlet running above sinus. Lamina thinly herbaceous, green, darker adaxially, glabrous on both surfaces. Sori long linear, medial, from near midrib to more than middle of veinlet; indusia brown, membranous, entire, opening acroscopically.

● Evergreen broad-leaved forests; ca. 800 m. SE Xizang (Mêdog).

Diplazium latipinnulum is similar to D. giganteum but differs by the oblong-lanceolate, glabrous pinnules.