Adiantum diaphanum

Rhizome short, covered with reddish-brown scales; fibrous roots with numerous, small, tuberlike swellings. Fronds tufted, erect to drooping, 8–22 cm long. Stipe relatively long, slender, almost black, smooth; scales few near base, pale. Lamina either pinnate and narrowly triangular or with 1–2 finger-like lobes near base; rachises very slender, dark, shiny and glabrous. Pinnules finely stalked at lower "corners", close-set, asymmetrical, sub-rhomboid to oblong, 3–14 mm long, 2–7 mm wide; minute stiff brown hairs on both surfaces; lower margins straight or slightly concave, entire, upper and outer margins broadly rounded with shallow lobes or teeth. Sori 2–10, mostly 5–10, small, in notches between lobes, covered by kidney-shaped to circular reflexed leaf flap which is covered with minute brown hairs.