燕尾蕨 yan wei jue

Polypodium bicuspe Blume, Enum. Pl. Javae 2: 125. 1828; Acrostichum bicuspe (Blume) Hooker.

Rhizome creeping, short, densely covered with hairs; hairs soft, pale brown, to 5 mm or more, multicellular. Stipes approximate, glabrous except near base; stipes of sterile fronds 20-30 cm, of fertile fronds up to 40-50 cm. Sterile lamina ovate, often deeply forked, or 2-forked into 3 lobes, or entire, base rounded, apex acute, sinus angles 60°-70°; main veins 6-8 at base of lamina, veinlets anastomosing, areoles with branching included veinlets. Fertile lamina simple, elliptic, 10-20 × 1-2 cm, thickly papery, abaxial surface wholly covered with sporangia in acrostichoid condition except on main veins and narrow strip at margins. Paraphyses abundant, club-shaped.

Terrestrial in forests; 1200-1300 m. Guizhou (Libo), Hainan, ?Taiwan [Indonesia, Japan, Malaysia, New Guinea, Thailand, Vietnam].