UW Burke Herbarium species comparison

Leaves monomorphic;

petiole reddish to blackish brown, somewhat shiny, 1-4 cm, 1/4 length of blade or less, with black scales linear-lanceolate or filiform at base, or none;

blade linear, 1-pinnate, 3-22 cm long and 0.5-1.5 cm broad, thin, slightly pubescent or not, base tapering gradually, apex narrowly acute, not rooting;

rachis reddish brown, shiny, glabrous or with sparse indument;

pinnae in 15-35 pairs, oblong to oval, medial pinnae 2.5-8 mm long and 2.5-4 mm broad, base broadly wedge-shaped, sometimes with low rounded auricle facing apex, margins with shallow round teeth to serrate to entire, apex obtuse.

Leaves monomorphic;

petiole reddish brown at base and green distally, somewhat shiny, 1-5 cm, 1/4 to 1/2 length of blade, covered with dark reddish brown to black narrowly deltate scales transitioning into glandular hairs;

blade linear, 1-pinnate, 2-13 cm long and 0.6-1.2 cm broad, thin, sparsely covered with minute hairs or not, base tapering slightly or truncate, apex acute, not rooting;

rachis completely green and dull, mostly glabrous;

pinnae in 6-21 pairs, deltate to rhombic, medial pinnae 5-6 mm long and 4-5 mm broad, base obtuse and frequently inequilateral, distal margins crenate, apex rounded to acute.

Sori in 2-4 pairs per pinna; spores 64 per sporangium.

Sori in 2-4 pairs per pinna; spores 64 per sporangium.