海南凤了蕨 hai nan feng liao jue

Coniogramme fraxinea (D. Don) Diels var. coriacea Merrill; C. lanceolata Ching.

Plants up to 1 m tall. Rhizomes decumbent, stout; scales broadly lanceolate. Stipe straw-colored or dark straw-colored, 20-50 cm × 3-8 mm, abaxially rounded, adaxially grooved; lamina ovate-oblong, 50-70 × 30-40 cm, 1-pinnate (sometimes basal pair of pinnae bifurcate), papery or thickly leathery when dry, both surfaces glabrous or sparsely pubescent abaxially. Pinnae 5-8 pairs, broadly lanceolate, broadly oblanceolate, or oblong, 20-35 × 3-5 cm, stalked, base cuneate or rounded-cuneate, margin entire, with cartilaginous sides, often undulate and revolute when dry, apex acuminate or caudate-acuminate. Veins distinct, 2-forked; hydathodes much enlarged, extending to cartilaginous lamina margin. Sori extending nearly to vein tips.

Forests in valleys; below 1400 m. Hainan, W Yunnan [NE India, Indonesia, Nepal, Philippines].

Fraser-Jenkins (Taxon. Revis. Indian Subcontinental Pteridophytes, 135. 2008) included Coniogramme merrillii and C. lanceolata within C. fraxinea.