黄志双盖蕨 huang zhi shuang gai jue

Allantodia wangii (Ching) Ching; Diplazium submettenianum Ching.

Plants evergreen, medium-sized. Rhizome ascending, up to 10 cm, up to 1.5 cm in diam., with dense stiff, black, shortly robust roots, apex scaly; scales dark brown, linear-lanceolate, 4-5 mm, thickly membranous, base rounded, margin entire, apex long acuminate; fronds caespitose. Fertile fronds up to 65 cm; stipe black-brown at base, upward pale green-stramineous, ca. 30 cm, up to 3 mm in diam. at base, base slightly swollen, sparsely scaly, scales similar to those on rhizome, upward glabrous, shallowly grooved adaxially; lamina nearly 1-imparipinnate, oblong to oblong-oblanceolate, up to 35 × 15 cm at middle; apical pinna larger, lanceolate, up to 14 × 1.8 cm, pinnatilobate to rounded and oblique lobes with small serrate margin, base of apical pinna with usually nearly free oblong lobes, apex acuminate and serrate; lateral pinnae ca. 10 pairs, alternate, ascending, upper pinnae sessile, lower pinnae shortly stalked, lanceolate, up to 12 × 1.5 cm, base cuneate, margin biserrate, apex acuminate; veins prominent, each group 1-4-furcate, veinlets parallel, all reaching pinna margin, ascending; lamina thinly papery, glabrous, gray-green when dry; rachis and costa stramineous, shallowly grooved adaxially. Sori linear, slightly curved, contiguous, from costa to near margin, variably long, longer sori from costa upward to 2/3 of veinlet length; indusia light brown, thinly membranous, persistent.

● Dense forests. Hainan.