Stems creeping, horizontal, slender, 2--4 mm diam.; scales mostly bicolored, narrowly lanceolate, largest scales 0.3--0.8 mm wide, centers black, thick, margins brown, thin, irregularly dentate. Leaves monomorphic, widely scattered along stem, 12--50 cm; croziers pubescent and bearing a few scales. Petiole straw-colored, tan, or gray, not lustrous, rounded or slightly flattened adaxially, without prominent articulation lines. Blade ovate to elongate-deltate, usually 2-pinnate proximally, 4--20 cm wide; rachis tan throughout, straight to slightly flexuous, rounded or flattened adaxially, ± pubescent. Pinnae perpendicular to rachis or slightly ascending, not decurrent on rachis, usually with 7--21 ultimate segments; costae straight to slightly flexuous, 20--100 mm, longer than ultimate segments. Ultimate segments ovate to elliptic, 5--15 mm, leathery, glabrous or usually puberulent abaxially; margins recurved on fertile segments, usually covering less than 1/2 abaxial surface, borders whitish, nearly entire; apex obtuse to slightly mucronate. Veins of ultimate segments obscure. Sporangia short-stalked, containing 32 spores, not intermixed with farina-producing glands. n = 2 n = 87, 116, apogamous.
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