Available all year round. Catgrass and golden fern. Perennial herbs. The rhizome is thick and short, ascending obliquely, densely covered with linear brown scales. The leaves are nearly raw; the petioles are 7 to 15 cm high, brown-black, shiny, and covered with chaff-like scales; the leaves are once pinnately compound, 15 to 30 cm long and 3 to 4 cm wide; the top pinnae is the largest, and the pinnae on both sides are 7 to 7 cm. 14 pairs, alternate, pinnae oval to oval-oblong, entire margin, blunt apex, the middle pinna is 2 to 2.5 cm long and 7 to 12 mm wide; the lower pinnae is dissected and stalked, and the upper one is sessile. The leaves are thick and papery, densely covered with slender rusty hairs on both sides, especially on the lower side; the veins are fan-shaped.

Catwort is the traditional Chinese medicine called Xun Gu Feng. There are reports that it contains aristolochic acid, which is toxic to the kidneys. Indications: Indications: Rheumatic joint pain, abdominal pain, malaria, and carbuncle. 1. Expelling rheumatism and unblocking meridians: used for rheumatic arthralgia, numbness of limbs, and spasm of muscles and veins. 2. Pain relief: used for bruises, stomachache, and toothache.

Synonyms include grasshopper, lotus, anemarrhena, hairspan fern, dragon head and phoenix tail ("Kunming Folk Herbal Medicines Commonly Used").

Cat's ear grass - source: It is the rhizome or whole grass of Aristolochiaceae. It is the whole grass or rhizome of the Gymnospermaceae plant, Gymnospermaceae.

Perennial herb, 30-50cm tall. The rhizome is thick and short, ascending obliquely, and is densely covered with long linear brown scales. The leaves are nearly raw; the petioles are 7-15cm high, brown-black, shiny, and covered with chaff-like scales; the leaves are once pinnately compound, 15-30cm long and 3-4cm wide; the top pinnae is the largest, and there are 7-14 pairs of pinnae on both sides. The pinnae are alternate, oval to ovoid-oblong, with entire margin and blunt apex. The middle pinnae is 2-2.5cm long and 7-12mm wide; the lower pinnae has a small stalk and the upper one is sessile; the leaves are thick and papery , both sides are densely covered with slender rusty hairs, especially on the lower side; the leaf veins are fan-shaped, and the sporangium groups grow along the side veins and are hidden in the rusty hairs; the sac group cover is absent.