滇南狗脊 dian nan gou ji

Rhizome decumbent, dark brown, stout, densely scaly; scales brown or dark brown, lanceolate, ca. 1.5 cm, membranous, entire, apex fibriform. Stipes close, brown-stramineous, 35-76 cm, 6-10 mm in diam., base densely scaly, sparsely scaly upward; lamina bipinnatifid, brown or brown-green when dry, oblong-ovate, 60-95 × 30-65 cm, leathery, glabrous, apex long acuminate; pinnae 13-15 pairs, alternate or lower ones opposite, oblique, subsessile or shortly stalked, basal pair slightly shortened; middle ones linear-lanceolate, 30-35 × 4-8 cm, base rounded-truncate or rounded-cuneate, margin pinnatifid, apex caudate-acuminate; lobes 20-22 pairs, alternate, lower ones slightly shortened; middle one longest, lanceolate or narrowly triangular-lanceolate, 2.6-5 × 1-1.5 cm, margin serrulate, apex acute; veins obvious, anastomosing with 1 row of areoles along rachis, costae, and costules, distally simple or forked, ending in submarginal fusiform hydathodes; rachis or costae densely covered with brown, fibriform, deciduous scales. Sori occupying costular areoles, linear, discrete; indusia dark brown.

Near forests, roadsides; 1400-1600 m. Yunnan [Vietnam].