形態特徵

• Evergreen fern; rhizome stout, erect.
• stipes tufted, 15-25 cm long, pale brown, scales linear, entire, dark brown, with narrow pale brown margin, 8-12 mm long and 1 mm broad at base of stipe, decreasing in size upwards.
• lamina oblong, pinnate, 25-35 cm long, 10-13 cm broad, apex pinnatifid, basal pinnae gradually shorted, deflexed; pinnae opposite or subopposite, pinna long falcate, 4-8 cm long, 1-1.5 cm broad, sessile to with a short stalk, cuneate or acuminate at apex, cordate or oblique cordate at base, margin denticulate or notched, or crenate in deeply dissected form; pinna stalk 1-3 mm long, densely covered by dark brown, linear scales; costa at abaxial side covered by small saccate scales; abaxial surface of pinna loosely covered by appressed multicellular hairs; sori round, usually in a single row on each side of costa, or in two rows in deeply dissected form.
• indusia round-reniform, entire; spore monolete, bean-shape, perispore cristate or reticulate with rugulate surfaces.

分布

• 台灣 : only one population has been found in the northern part so far, very rare.
• 世界 : Southern China and Japan.

引證標本

Hsichih, Mt. Hsinshan, near mountain peak, 499 m, at the edge of the broad-leaved forest, H.-M. Chang 5588 (TAIF, TNU).

參考文獻

• Ho-Ming Chang, Wen-Liang Chiou and Jenn-Che Wang. 2003. Taiwania 48(3): 197-202.