长叶蹄盖蕨 chang ye ti gai jue

Rhizomes short, erect, apex densely clothed with brown, lanceolate scales. Fronds caespitose; fertile fronds ca. 70 cm; stipe pale stramineous at base, upward dark stramineous, shiny, ca. 15 cm, ca. 3 mm in diam., base similarly scaly; lamina 2-pinnate, narrowly lanceolate, ca. 55 × 11 cm at middle, base slightly narrowed, apex caudate or long acuminate; pinnae ca. 45 pairs, lower pinnae opposite, upper pinnae alternate, approximate, spreading or ascending, sessile, lower pinnae slightly shortened, basal pinnae ca. 4 cm; middle pinnae larger, falcate-lanceolate, 6-8 × ca. 1.8 cm, base rounded-truncate, abutting against rachis on acroscopic side, pinnate, apex caudate-acuminate; pinnules 10-12 pairs, lower pinnules opposite; upper pinnules alternate, ascending; basal pinnules largest, narrowly oblong, 8-9 × 5-6 mm, base somewhat cuneate, decurrent and adnate to wing of costules, pinnatilobate, apex obtuse; segments with long acute teeth at apex; upper pinnae gradually smaller, approximate, base decurrent and adnate to wing of rachis, margin dentate, apex caudate. Veins pinnate in pinnules, lateral veins 3 or 4 pairs, oblique, lower veins 2- or 3-forked, upper veins simple. Lamina herbaceous when dried, nearly black adaxially, brown abaxially, glabrate on both surfaces; rachis and costae pale purplish red abaxially, ± hairy in adaxial groove, hairs brown short glandular hairs, spinose at base of costules on adaxial side. Sori shortly linear, 3 or 4 pairs per pinnule, borne on acroscopic veins, inframedial; indusia pale brown, shortly linear, membranous, subentire, persistent. Perispore surface without folds.

● On rocks in forests; 1000-1200 m. N Guangxi, Jiangxi.