Adiantum flabellulatum L.

Plants terrestrial, 20-45 cm tall. Rhizomes erect, short, scales dense, yellowish to brown, glossy, linear-lanceolate, margins entire. Fronds clustered; stipe black-purple, glossy, 10-30 cm, adaxially grooved with short stiff brown hairs inside, base covered with same scales as rhizome, distally glabrous; lamina pedately 2-or 3-dichotomously branched, flabellate in outline, 10-25 cm, middle pinnae usually longer, 1-imparipinnate; costae and stalks purple-black, abaxially glabrous, adaxially with dense, short, brown-red hairs; middle pinnae 1-pinnate, linear-lanceolate, 6-15 × 1.5-2 cm; outer pinnae similar but slightly shorter, up to 5 cm; pinnules 8-15 pairs per pinna, alternate, horizontally spreading; stalk 1-2 mm; blade below middle ± uniform in size, dimidiate-semi-orbicular when fertile, rhomboid when sterile, 6-15 × 5-10 mm, thinly leathery, green or dark brown, both surfaces glabrous, base broadly cuneate or flabellately cuneate, inner and lower margins straight and entire, outer and upper margins subrounded or rounded-truncate, fertile parts shallowly sinuate, segments entire, sterile parts denticulate; distal pinnules similar but slightly smaller; terminal pinnules obovate or flabellate, equal to or slightly larger than lower pinnules; veins multidichotomously forked and reaching margins, visible on both surfaces. Sori 2-5 per pinnule, horizontal, at upper and outer margins of segments; false indusia dark brown, semi-orbicular or oblong, glabrous, upper margins flat and straight, entire, persistent. Perispore indistinctly granular. 2n = 116.

It is a subtropical plant. It grows in acid soils. It grows up to 1,000 m above sea level.