长柄蹄盖蕨 chang bing ti gai jue

Rhizomes short, erect, apex densely clothed with blackish brown, linear-lanceolate scales. Fronds caespitose; fertile fronds 50-60 cm; stipe blackish brown, upward stramineous, 25-30 cm, 2.5-3 mm in diam., base densely scaly, upward glabrate; lamina 2-pinnate, broadly ovate, ca. 25 × 15 cm, apex acuminate; pinnae ca. 8 pairs, basal pinnae opposite, upper pinnae alternate, stalked (stalk 6-15 mm), broadly lanceolate, 13-15 × 4-4.5 cm at middle, base subcordate, pinnate, apex acuminate; pinnules ca. 12 pairs, alternate, subspreading, lower pinnules shortly stalked (stalk 1-2 mm), oblong-triangular, 2-2.5 × ca. 1 cm at base, base slightly inequilateral, ± auriculate (acroscopic side larger), pinnatilobate, apex acute and serrulate; veins visible abaxially, inconspicuous adaxially, pinnate in segments, lateral veins oblique, simple. Lamina papery when dried, dark greenish brown, glabrate; rachis and costae with brownish short glandular hairs abaxially. Sori oblong, ca. 7 pairs per pinnule, inframedial, uniseriate on both sides of midrib, often 1 or 2 pairs in basal auriculate lobe of pinnule; indusia brownish, elongated, sometimes horseshoe-shaped in auriculate lobes, membranous, entire, persistent. Perispore surface without folds.

● Wet areas in forests on mountain slopes; 800-1800 m. Guizhou, Hunan.