显脉尖嘴蕨 xian mai jian zui jue

Hymenolepis annamensis C. Christensen, Dansk Bot. Ark. 6: 68. 1929; Belvisia annamensis (C. Christensen) Tagawa; Macroplethus annamensis (C. Christensen) Tagawa.

Rhizome shortly creeping, ca. 3 mm in diam.; scales brown, lanceolate, dentate near base, entire at apex. Fronds rather closely spaced; stipe 2-5 cm, narrowly winged; lamina pale brown to brown when dried, sterile lower parts ovate-lanceolate or narrowly elliptic, 15-50 × 3.5-4.5 cm, papery, base cuneate, decurrent, margin entire, apex contracted to linear fertile part; fertile part 6-20 × 0.5-1 cm. Main vein strong, raised on both sides, veinlets faintly visible. Sori linear, leaving a narrow sterile zone free near midrib; paraphyses peltate, stellate, margin denticulate, 0.2-0.3 mm in diam.

Among moss on shaded and wet tree trunks in forests; 800-1100 m. Hainan [Laos, Thailand, Vietnam].