Synonym: Acrophorus immersus; Acrophorus immersus; Humata immersa;
Leucostegia immersa; Davallia immersa; Humata dryopteridifrons.
Genus: 2 species.
Region: Guangxi, Taiwan, Xizang, Yunnan; Bhutan, Cambodia, India, Indonesia, Malaysia, Myanmar, New Guinea, Philippines, Thailand; Pacific islands.
Habitat: secondary forest; on shaded hillsides; 1000 to 2800 m.
BotanyFern; epiphytic and terrestrial.
Root: rhizome robust, long creeping, ± 4 mm diameter; densely covered with scales and yellowish brown hairs. Scales brown, lanceolate or ovate-lanceolate, ca. 3 mm, membranous, margin subentire, apex long acuminate.
Leaves: remote; 2to 5 cm apart; stipe stramineous, 25 to 35 cm; lamina slightly green when dry, deltoid, 25-35 cm, nearly as wide, anadromous, papery, glabrous, tripinnate, apex acuminate; pinnae 10 to 12 pairs, basal pair subopposite, 4 to 6 cm apart, narrowly triangular, broadest toward base, with stalk 5-20 mm, base broadly cuneate, largest pinnae ovate-lanceolate.
Sori: separate; 1 or 2 per segment; terminal on acroscopic veinlet; indusium attached by base only; oval or elliptic; ± 1 by 2 mm; thinly papery.