多变叉蕨 duo bian cha jue

Plants terrestrial, 50-60 cm tall. Rhizome long creeping, ca. 0.5 cm in diam., scaly at apex and stipe bases; scales light brown, linear-lanceolate, 4-5 mm, membranous, entire, apices acuminate. Fronds subclustered; stipe stramineous, 30-35 cm, ca. 3 mm in diam., glabrous, not winged. Lamina simple or odd-pinnate, light brown when dried, deltoid, 20-25 × 10-15 cm, papery, both surfaces glabrous; rachises, costae, and lateral veins stramineous, glabrous, raised on both surfaces; terminal pinna lanceolate, ca. 20 × 5-10 cm, stalks ca. 2 cm, base decurrent, apex long acuminate, subentire; lateral pinnae 1 or 2 pairs, opposite, oblique, sessile, without gemmae, ovate-lanceolate, lateral pinnae 1 or 2 pairs, opposite, upward, interval 2-3 cm, stalks 3-5 mm, lanceolate, 15-17 × 2-4 cm, bases cuneate, apices caudate, entire. Veinlets forming inconspicuous subhexagonal areoles, included veinlets simple or forked. Sori orbicular, on anastomosing veins, in 2 or 3 irregular rows between lateral veins; indusia light brown, reniform, membranous, entire, persistent.

On rocks in dense forests; ca. 300 m. Hainan (Baoting) [N Vietnam].