栎叶槲蕨 li ye hu jue

Polypodium quercifolium Linnaeus, Sp. Pl. 2: 1087. 1753.

Rhizome shortly creeping, 2-3 cm in diam. or more; scales spreading, blackish brown, linear, 6-20 × 0.5-1 mm, pseudopeltate or peltate, toward apex strongly dentate, apex long, narrow, acute; fronds dimorphic; basal fronds sessile, 15-50 × 10-30 cm, shallowly lobed; foliage fronds stalked, stipe up to 30 cm, not or inconspicuously winged; lamina pinnatifid up to 2-5 mm from costa, 40-100 × ca. 40 cm, apex aborted; pinnae broadly lanceolate, 15-25 × 2-3.5 cm, apex acute or acuminate. Sori in 2 rows between costa and margin, regular or irregular in 2 rows between lateral veins, slightly sunken. Spores with acuminate spines.

Epiphytic, spirally climbing, occasionally epilithic or terrestrial, in various types of primary and secondary forests, plantations; sea level to 1000 m. Hainan [India, Malaysia, Nepal, New Guinea, Philippines, Sri Lanka, ?Vietnam; Australia].