达边蕨 da bian jue

Rhizomes shortly creeping; scales castaneous, linear or narrowly lanceolate, 3-8 cells wide at base, acicular at apex. Fronds clustered or approximate; stipe dark stramineous, 10-35 cm, glabrescent except near base, narrowly sulcate adaxially, 2-angular abaxially except at base; lamina oblong, 15-60 × 9-30 cm, papery to subleathery, simply pinnate, with 15-20 pinnae per side, base slightly narrowed, apex acuminate; pinnae linear, 7-20 × 0.3-1 cm, sessile or subsessile, base cuneate, margin shallowly serrate or crenate, or sometimes deeply lobed, apex acuminate; rachis stramineous, glabrescent, narrowly sulcate adaxially; veins distinct on both surfaces, once or twice forked, oblique. Sori submarginal, terminal on veins; indusia half cup-shaped. 2n = ca. 300.

Terrestrial in forests; near sea level to 500[-2000] m. Taiwan [India, Indonesia, Japan (Ryukyu Islands), Malaysia, New Guinea, Philippines, Thailand; Pacific islands].

Two varieties are tentatively accepted.

Lower Taxa

• Tapeinidium pinnatum var. biserratum (Blume) W. C. Shieh
• Tapeinidium pinnatum var. pinnatum