Asplenium dielpallidum, a member of the spleenwort family (Aspleniaceae), is a fern that grows in tufts of three to four light green, lance-shaped fronds along with a few persistent dead ones. The midrib of the frond ranges from dark purple to brownish gray in color and has a dull sheen. Scales on the midrib are brown, gray, or black; 3 to 5 mm (0.1 to 0.2 in) long; and rather inconspicuous. The fronds measure 30 to 55 cm (12 to 22 in) in length and 5 to 12 cm (2 to 5 in) in width and have short black hairs on the underside. Each frond has approximately 20 to 40 pinnae (divisions or leaflets). The largest pinnae are in the middle section of the frond, while the lower section has triangular, somewhat reduced pinnae, with the lowermost pair of pinnae raised above the plane of the others. The sori (groups of spore-producing bodies), which are frequently fused along an extended line, are encircled by a prominent vein.