An evergreen perennial herb. The rhizome stands short and diagonal, with brown, linear scales on one side that extend to the base of the petiole. The petiole is 20 to 35 cm long, reddish-brown and shiny, with a triangular cross section. The blade is twice pinnately fissured. As a whole, it is oval to oblong and 20 to 40 cm long. The foliage is thin and hard like paper, and the central axis is reddish brown and shiny. The top wings are very long with a fine feather-like deep tear near the tip and can be as long as 25 cm. There are 3-6 pairs of side wings. The fragment on the base side of the wing piece is clearly longer than that on the tip side. The length of the splinter is longer at the base side wings and shorter at the tip. In some cases, there are no tips on the tip side. In addition, the root fragment at the base of the lower side wing is often developed and becomes a small wing with a wing-like deep tear. Sharp, small saw teeth line the splinter-free lobes and tips.