形態特徵

• Evergreen fern; rhizome short, erect to ascending.
• Frond pinnate with terminal pinna, or seldom simple. Stipes tufted, 10-40 cm long, pale brown, base black; scales persistent only at stipe base, linear lanceolate or lanceolate, dentate, dark brown, 3-8 mm long and less than 0.5 mm broad, toothed at margin.
• Lamina ovate or oval, 25-40 cm long, 15-25 cm broad, coriaceous. Pinnae alternate, oblong-lanceolate or falcate, 15-25 cm long, 2.8-4.5 cm broad, sessile or with a short stalk, cuneate or obliquely cuneate at base, acute or acuminate at apex, margin scarcely denticulate or crenate but serrate at near apex; when young, pinna scarcely attached with hairlike, black, ca. 1 mm-long scales at costal position, and with multicellular hair on abaxial surface; pinna stalk 0-5 mm long; costa with groove and connected with rachis, prominent on abaxial surface; vein usually twice to triple forked, visible beneath. Sori usually solely formed at the acroscopic side of the first veinlet in each venous set, linear, from pericostal to medial or supramedial position; indusia linear, open acroscopically, entire at margin.
• Spores anisopolar, bilateral, monolete; perispore forming a continuous winglike fold, anastomoses few, surface subsmooth.

分布

• 台灣 : only one population with less than 20 individuals found in the northern part so far.

引證標本

Taoyuan County: Fuhsin, Mt. Peichatienshan, ca. 1200 m, under the broad-leaved forest, Nov. 14-15, 2003, H.-M. Chang 5887 (TAIF), H.-M. Chang 5888 (TAIF, TNU, Taiwan Endemic Species Research Institute); around the same locality, Aug. 7, 1992, S.-J. Moore 15042 (TNU).

參考文獻

• Ho-Ming Chang, Shann-Jye Moore, Wen-Liang Chiou and Jenn-Che Wang. 2006. Taiwania 51(4): 287-292.