Habit, rhizome morphology. Plants forming tufts of 4 or 5 fronds. Runners 1-2 mm thick, branching angle narrow. Scales on runners very sparse to dense, appressed. Tubers absent. Fronds 110-210 cm long (or more), 26-38 cm wide, stipe 23-45 cm long. Lamina base truncate, tapering over 25-30 cm, basal pinnae 4-12 cm long, 3.5-12 cm distant, middle pinnae slightly to distinctly falcate. Sterile pinnae 14-18 by 1.7-2.4 cm, base slightly unequal, basiscopic base cuneate, truncate or rounded, acroscopic base emarginate or slightly cuneate, not auricled, margin in basal part crenate to serrate, towards apex more distinctly serrate, apex acuminate or caudate with cauda to 3 cm long. Fertile pinnae 14-28 by 1.1-1.4 cm, base often more narrowly cuneate and margin more deeply incised (to 2-3.5 mm) than the sterile pinnae. Indument. Basal scales peltate, appressed, 3 by 1 mm, central part dark brown, shining, margin in basal part hyaline, fimbriate, in acumen fimbriate, near apex entire, marginal glands present around the base. Rhachis scales dense, with a well-developed protracted acumen, spreading or squarrose, hyaline, acumen ciliate (acumen of larger scales composed of a long, sclerified subular protrusion). Scales on lamina usually persistent, sparse, present on lower surface only. Hairs on lamina absent, costa absent. Sori marginal (on teeth), 28-50 pairs on fully fertile pinnae, round, not impressed. Indusium reniform, with narrow sinus, attached at sinus.
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