Nephrolepis exaltata (L.) Schott

Stem scales spreading, concolored. Tubers absent. Leaves 4--15 × 0.5--1.2 dm. Petiole 0.2--4 dm, sparsely to moderately scaly; scales spreading, pale brown to reddish brown, concolored. Blade glabrous, sparsely to moderately scaly abaxially near costae and adaxially. Rachis 2.4--16.3 dm, points of pinna attachment 7.3--21 mm apart; scales moderately spaced, pale to dark brown, essentially concolored or margin indistinctly paler; hairs absent. Central pinnae deltate-oblong, slightly to distinctly falcate, 2.3--7.4 × 0.6--1.8 cm, base truncate to truncate-auriculate or auriculate, occasionally overlapping rachis, acroscopic lobe deltate to acute, margins serrulate, apex acute to deltate; costae adaxially glabrous. Indusia reniform to horseshoe-shaped, attached at narrow or broad sinus, 1--1.7 mm wide.