大相岭蹄盖蕨 da xiang ling ti gai jue

Rhizomes short, erect, apex clothed with red-brown, linear scales. Fronds caespitose; fertile fronds 37-50 cm; stipe blackish brown at base, upward stramineous, shiny, 18-28 cm, ca. 2.2 mm in diam. at base, base similarly scaly, upward glabrate; lamina nearly 2-pinnate, narrowly ovate, ca. 25 × 13 cm at middle, base slightly narrowed, apex acuminate; pinnae ca. 16 pairs, basal pinnae opposite, upper pinnae alternate, subspreading, subsessile, base slightly narrowed; middle pinnae lanceolate, up to 7 × ca. 1.5 cm, base equilateral, truncate, slightly broadened, nearly pinnate, apex acuminate; pinnules ca. 15 pairs, basal pinnules opposite, upper pinnules alternate, spreading, approximate, oblong, ca. 7 × 3.5 mm, base decurrent and adnate to costa wing, somewhat crenate at margin, apex rounded and with 3-5 teeth; veins visible abaxially, pinnate in pinnules, lateral veins 5 or 6 pairs, oblique, simple, or forked on basal acroscopic side. Lamina papery when dried, yellow-green, glabrate on both surfaces; rachis stramineous, with short hairs, costae pale red-purple, with sparse short hairs abaxially, with subulate spines on basiscopic margin of adaxial groove at costa or costule bases. Sori elliptic, 3 or 4 pairs per pinnule (or segments), inframedial on costules; indusia brown, similar to sori in shape, occasionally J-shaped, membranous, erose at margin, persistent. Perispore surface without folds, with granular ornamentation.

● Meadows on mountain slopes; 2200-2500 m. W Sichuan, Yunnan.