锯蕨 ju jue

Polypodium okuboi Yatabe, Bot. Mag. (Tokyo) 5: 35. 1891; Grammitis okuboi (Yatabe) Ching; Micropolypodium pseudotrichomanoides (Hayata) Hayata; P. pseudocucullatum Rosenstock; P. pseudotrichomanoides Hayata; Xiphopteris okuboi (Yatabe) Copeland.

Stipe short, rarely up to 1.5 cm, glabrous or with occasional to scattered hairs up to 1.5 mm. Lamina linear to oblong-lanceolate, 2-15 × 0.3-0.6 cm, up to 25 × 0.8 cm, gradually attenuate toward base to form wing on stipe, apex obtuse or acute; pinnae oblong or ovate-oblong (middle pinnae), 1.8-3.2 × 0.8-1.8 mm, sometimes slightly falcate, entire, or seldom with 2-4 teeth on acroscopic margin, acute to rounded at apex; rachis prominent on abaxial side, slightly grooved on adaxial side, concolorous with lamina or pale to medium brown on both sides; hairs occasional to scattered on all parts of lamina, similar to those on stipe. Sori orbicular to elliptic, close to rachis.

Moss-covered tree trunks, rocks in mountain forests; 1000-2700 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Taiwan, Zhejiang [Japan].