清秀复叶耳蕨 qing xiu fu ye er jue

Rumohra spectabilis Ching, Sinensia 5: 58. 1934; Arachniodes nitidula Ching.

Rhizome ascending, stiff, 3-5 cm in diam., apex densely scaly; scales reddish brown, linear-lanceolate or filiform, 1.5-2.5 cm × 0.5-2 mm, tortuous and soft. Fronds approximate, 0.9-1.5 m; stipe stramineous, 50-75 cm, ca. 6 mm in diam., base tufted with scales similar to those on rhizome, scales sparser upward; lamina 3- or 4-pinnate, shiny brownish green when dried, ovate-oblong or ovate-pentagonal, 40-75 × 35-40 cm, subleathery, base rounded-cuneate, apex acuminate, rachis sparsely scaly as distal portion of stipe; pinnae ca. 10 pairs, stalked, alternate or lowest pair opposite, obliquely spreading, subimbricate; lowest pinnae broadly deltoid-lanceolate, to 35 × 25 cm, base rounded, apex acuminate; primary pinnules ca. 12 pairs, stalked, deltoid-oblong (lanceolate distally), proximal basiscopic 1 or 2 slightly longer; secondary pinnules to 20 pairs, deltoid or linear-lanceolate, base cuneate, apex acuminate and caudate; ultimate pinnules (secondary pinnules for 3-pinnate leaves) contiguous to imbricate, oblique-oblong, ca. 12 × 4 mm, base acroscopically truncate, basiscopically cuneate, apex obtuse, margin sharply serrate, teeth without mucronate tips; upper pinnae gradually reduced; axes and veins of ultimate segments with sparse minute brown linear scales abaxially. Sori large, terminal (or subdorsal) on veinlets, 1-4 pairs per ultimate segment, medial between margin and midvein; indusia dark brown, subleathery, and entire.

Slopes in broad-leaved forests or by streamlets, also on dry slopes under open forests, occasionally in bamboos; (600-)1200-1800 m. S Yunnan [India, Laos, Myanmar, N Thailand].