金佛山双盖蕨 jin fo shan shuang gai jue

Basionym: Allantodia jinfoshanicola W. M. Chu, Acta Phytotax. Sin. 21: 221. 1983.

Plants large. Rhizome creeping, black-brown, ca. 2 cm in diam., apex densely scaly; scales dark brown, broadly lanceolate, entire, central cells prominently larger than marginal cells; frond approximate. Fertile frond ca. 1.4 m; stipe dark brown at base, upward pale brown to stramineous, ca. 65 cm, ca. 5 mm in diam. at base, with sparse repand scales, upward glabrous; lamina 2-pinnate with pinnules pinnatifid to pinnatipartite, deltoid, ca. 75 × 65 cm, apex acuminate; pinnae ca. 8 pairs, alternate or subalternate, slightly ascending, lower pinnae broadly oblong-lanceolate, base slightly narrowed, stalked, nearly symmetrical, apex acuminate; basal pinnae large, ca. 40 × 15 cm, with stalk up to 4 cm; pinnules of lower pinnae up to 10 pairs, alternate, subspreading, up to 8 × 2.5 cm, base asymmetrical, subspreading on basiscopic side, apex acuminate; lower pinnules shortly stalked; pinnule lobes up to 10 pairs, slightly ascending, oblong, margin crenate, apex rounded; basal acroscopic lobe smaller; veins visible abaxially, not prominent adaxially, veinlets up to 7 pairs per pinnule lobe, ascending, forked or simple, few pinnate. Lamina thinly herbaceous when dry, green abaxially, dark green adaxially, glabrous, rachis and costae with brown short glandular hairs. Sori linear, from near costule to apart from pinnule margin, single or double; indusia light brown, membranous, persistent. Spores orbicular, perispore prominent, few rugate.

● Valleys, broad-leaved forests; ca. 1500 m. Chongqing (Jinfo Shan).

Diplazium jinfoshanicola is similar to D. hachijoense but differs by the lamina thinly herbaceous when dry, cells in the center of scales prominent, larger than those in the margin, sori close to midrib, and spores orbicular.