Rhizomes are short and hard, extending sideways or standing diagonally. The scales are attached to the base of the rhizome and petiole. The scales are linear lanceolate, 2 to 8 mm in length and less than 1 mm in width, brown, with hair on the edges. The petiole is 25 to 45 cm long, pale straw in color, and its base is thickened to make the scale slightly denser. The leaf blade is twice pinnate compound leaf. The whole shape is oval oblong, 30 to 40 cm long and 15 to 35 cm wide. The side wings develop clearly in the lower 3-5 pairs, but from there on, the wings suddenly become shorter, forming a top wing similar to the side wings. Each wing has a handle and a linear lanceolate shape, with the widest base and tapering toward the tip. In the lower wing, the small wing at the base of the base develops like a small wing. The tip of the winglet is hard and sharp, with a shallow serrated edge. The leaf surface is green, and some plants have whitish spots along the feather axis. The sporangia emerges at the midpoint between the middle rib and the rim of the winglet, and the spore membrane has a round kidney shape and the rim is smooth or slightly wavy.