狭羽节肢蕨 xia yu jie zhi jue

Polypodium tenuicaudum Hooker, Sp. Fil. 5: 90. 1864; Arthromeris notabilis Ching; Pleopeltis juglandifolia (D. Don) T. Moore var. tenuicauda (Hooker) Beddome; Polypodium wallichianum Sprengel var. tenuicaudum (Hooker) Hooker.

Rhizome 6-8 mm in diam., densely scaly throughout; scales brown, lanceolate, margin ciliate, apex acuminate. Stipe stramineous, 15-25 cm, glabrous; lamina imparipinnate, 35-45 × 15-25 cm; pinnae 8-12 pairs, subopposite, stalked, oblique, ovate-lanceolate, 15-25 × 2-4 cm, base cuneate, apex long acuminate; upper pinnae usually fertile and slightly narrower; lamina herbaceous, both surfaces glabrous. Sori orbicular, 1.5-2 mm in diam., in a single row on each side of costa, medial or slightly nearer costa, solitary between lateral veins.

Epiphytic on tree trunks or epilithic; 1200-2800 m. Xizang, Yunnan [NE India, N Myanmar].