大片复叶耳蕨 da pian fu ye er jue

Aspidium cavaleriei Christ, Bull. Acad. Int. Géogr. Bot. 13: 116. 1904 ["cavalerii"]; Arachniodes acuminata Ching & Chu H. Wang; A. baiseensis Ching; A. guangxiensis Ching; A. obtusiloba Ching & Chu H. Wang; A. pseudocavaleriei Ching; A. sphaerosora (Tagawa) Ching; A. triangularis Ching; Byrsopteris cavaleriei (Christ) Sa. Kurata; Dryopteris cavaleriei (Christ) C. Christensen; D. sphaerosora Tagawa; Polystichopsis cavaleriei (Christ) Tagawa; Rumohra cavaleriei (Christ) Ching.

Rhizome ascending, woodlike stiff, apex scaly; scales yellow or dark brown, lanceolate, 1-2.5 × 0.2-0.4 cm, firmly papery, somewhat twisted clockwise. Fronds approximate, 0.5-1.1 m; stipe stramineous, 30-65 cm, 3-6 mm in diam., base moderately scaly, with scales similar to those on rhizome, glabrescent upward; lamina 3-pinnate, yellowish green when dried, ovate-deltoid, 25-50 × 20-35 cm, leathery, base cuneate or rounded-cuneate, apex acuminate and pinnatifid, rachis glabrescent; pinnae (1-)3-5-pairs, alternate, with 1-3 cm stalk, obliquely spreading, approximate; lowest pinna deltoid or oblong-deltoid, 15-28 × 10-15 cm, base broadly cuneate, apex acuminate; primary pinnules 5-9 pairs, with 0.5-1.5 cm stalk, obliquely spreading, basal basiscopic one ± longer than adjacent ones, lanceolate; secondary pinnules shortly stalked, deltoid-lanceolate, slightly falcate, 4-7 × 1.5-3 cm, base acroscopically oblique-truncate and auriculate, basiscopically cuneate, apex acuminate, caudate-acuminate, acute, or obtuse, margin pinnatifid, coarsely serrate, or crenate; lobes or serrations blunt or acute; upper pinnae triangular-lanceolate or lanceolate, often 1-pinnate; axes and veins of ultimate segments occasionally with sparse glandular hairs or minute brown scales abaxially. Sori dorsal on veinlets, 3-5(-7) pairs per ultimate segment, closer to midvein (of ultimate segment) than margin; indusia brown, membranous or thickening with age, entire, sometimes dorsally with glandular hairs.

Along streams in dense woods, in shaded ravines, or on moss-covered rocks by flowing water in open places, mixed with Dicranopteris pedata; (200-)400-1600 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, S Hunan, Jiangxi, Yunnan [Japan, N Thailand].