灰茎节肢蕨 hui jing jie zhi jue

Polypodium venustum var. niphoboloides C. B. Clarke, Trans. Linn. Soc. London, Bot. 1: 567. 1880.

Rhizome scales narrowly lanceolate, 3-4 mm in diam., margin toothed. Stipe dark stramineous, 5-15 cm, glabrous; lamina 15-25 × 10-15 cm; pinnae 1 or 2 pairs, ovate-lanceolate, 8-12 × 4-5 cm, base rounded. Lamina herbaceous or papery, abaxially tomentose, adaxially glabrous. Sori buried in tomentum, hardly visible.

Epilithic; 2000-2600 m. Yunnan [Bhutan].