粗柄蹄盖蕨 cu bing ti gai jue

Rhizomes short, erect, apex densely clothed with red-brown, linear scales. Fronds caespitose; fertile fronds 62-68 cm; stipe blackish brown at base, upward brown-stramineous, 34-37 cm, 2.5-5 mm in diam., base similarly scaly, upward glabrate; lamina 2-pinnate, ovate-oblong, 30-40 × 14-18 cm at middle, base rounded-cuneate, apex shortly acuminate; pinnae 14-16 pairs, alternate, ascending, with short stalk ca. 1.5 mm or sessile; basal pinnae not shortened, lanceolate, 13-15 × ca. 4 cm at middle, base narrowed, pinnate, apex acuminate; pinnules ca. 17 pairs, basal pinnules opposite, upper pinnules alternate, spreading, approximate, sessile, oblong, up to 2 cm × 7-8 mm at middle, base subequilateral, broadly cuneate, auriculate on acroscopic side, decurrent on basiscopic side, pinnatifid to 1/2, apex obtuse; pinnule segments 6-8 pairs, oblong, approximate, ascending, apex obtuse and with 2 or 3 teeth; second basal and upper pinnae similar to basal pinnae, gradually smaller, second basal pinnae ca. 3.2 cm wide at middle, base not narrowed, widest; veins inconspicuous adaxially, somewhat visible abaxially, pinnate in pinnule segments, lateral veins 2 or 3 pairs, oblique, simple. Lamina firmly papery when dried, greenish brown, occasionally with short hairs adaxially, glabrate abaxially; rachis and costae abaxially stramineous, with sparse short hairs, with subulate short spines at base of costae and costules on adaxial side. Sori large, elliptic, 1 per segment, 7-9 pairs per pinnule, biseriate on both sides of costule, inframedial; indusia brown, elliptic or horseshoe-shaped, thickly membranous, entire, persistent. Perispore surface without folds, with granular ornamentation.

● Bamboo forests; 2200-2300 m. W Sichuan (Daxiangling, Niba Shan).