棕毛轴脉蕨 zong mao zhou mai jue

Nephrodium setulosum Baker, J. Bot. 28: 265. 1890; Ctenitopsis setulosa (Baker) C. Christensen ex Tardieu & C. Christensen; Dryopteris dissecta (G. Forster) Kuntze var. lepidota Christ; D. setulosa (Baker) C. Christensen.

Plants terrestrial, up to 2 m tall. Rhizome erect, short, stout, ca. 2 cm in diam., densely scaly at apex; scales deep brown with paler margin, broadly lanceolate to ovate-lanceolate, 1-1.5 cm, entire, apices acuminate. Fronds clustered; stipe dark brown, 60-80 cm, ca. 1 cm in diam. at base, grooved above, densely clothed with light brown articulate hairs, lower part densely clothed with brown scales like on rhizome, narrower and sparser upward. Lamina tripinnate to quadripinnatifid, brown when dried, triangular-ovate, 100-150 × 70-80 cm, papery, abaxially glabrous, adaxially hairy, base cordate, apex long acuminate; rachises, costae, and main veins dark brown, densely clothed with brown articulate hairs; pinnae ca. 15 pairs, lower part subopposite, oblique upward, interval 2-3 cm; basal pinnae largest, obliquely triangular, 40-45 × 30-35 cm, stalks 4-5 cm (with shorter stalks upward), bases cuneate and nearly symmetrical, apices long acuminate, basiscopic pinnules slightly longer; middle pinnae triangular-ovate, 35-40 × 25-30 cm, bases rounded-cuneate, apices long acuminate, basal basiscopic largest pinnules broadly lanceolate, 16-20 × 7-9 cm, bases cuneate, apices long acuminate, bipinnate at base, bipinnatipartite to broad wings beside costa upward; ultimate pinnules ca. 15 pairs, alternate, interval 6-8 mm, oblique, sessile and adnate to pinnule rachises, basal pair larger, lanceolate, 4-5 × 1-1.5 cm, basiscopic lobes decurrent at base, apices long acuminate, pinnatifid at base, scalloped or subentire upward; lobes 8-10 pairs, interval 1-1.5 mm, oblique, falcate-ovate, 4-6 × 3-4 mm, obtuse, entire, margins ciliate with brown articulate hairs. Veins pinnate, free, veinlets 5-7 pairs, simple or forked, slightly raised and with sparse brown articulate hairs on both sides. Sori orbicular, 4-6 pairs, terminal on veinlets, near margin; indusia brown, orbicular-reniform, membranous, glabrous, entire, persistent.

Forests; 300-600 m. Guangdong, Guangxi, Yunnan [N India, Malaysia, Myanmar, Vietnam].