光叶条蕨 guang ye tiao jue

Aspidium musifolium Blume, Enum. Pl. Javae 2: 141. 1828; Oleandra hainanensis Ching; O. whangii Ching.

Plants terrestrial or epilithic; rhizome stiff, long creeping, growth sympodial, continuing mostly from lateral branches below each tuft of fronds, 4-5 mm in diam., white waxy under scales; roots long, stiff, restricted to ventral side, usually with unbranched glabrous part (rhizophore); scales strongly appressed, dark brown at middle, pale brown at apex and margin, narrowly ovate-lanceolate, 3-5 × 0.5-1.5 mm, base rounded or subacute, margin ciliate, apex long acuminate. Fronds erect, mostly in tufts of 2-4; phyllopodia very short, 1-2 mm, sometimes up to 5 mm, immersed in scales; stipe stramineous, 1-2.5 cm; lamina green or brown when dry, linear-lanceolate, 12-43 × 1.8-3.5 cm, herbaceous, abaxially sparsely hairy, adaxially pubescent or glabrous, base cuneate to rounded, margin slightly wavy, not undulate, and glabrous, apex long acuminate or caudate; costa raised on both sides, sparsely scaly abaxially, slightly grooved adaxially; veins simple or forked at base, rarely forked medially. Sori 2-4 mm from costa; indusia brown, margin pale brown, orbicular-reniform, glabrous.

Dense forests, often on rocky cliffs; 300-1800 m. Guangxi, Hainan, Yunnan [Indonesia, Malaysia, Sri Lanka, Thailand, Vietnam].