Pyrrosia, also known as sarcophagus, stone bark, Venus grass, etc. , a perennial herb of Polypodiaceae, the whole grass height is 13 ~ 30 cm. Born in rocks or trees in Shan Ye. Distributed in Anhui, Jiangsu, Zhejiang, Fujian, Taiwan Province, Guangdong, Guangxi, Jiangxi, Hubei, Sichuan, Guizhou, Yunnan and other places.

Bauxite lotus (scientific name: Lepidogrammitis drymoglossoides) is a species of Polypodiaceae. Rhizomes slender and transverse, and subulate with dentate brown lanceolate scales. Distant leaves,1.5-5cm, type Ⅱ; The sterile leaves are oblong to ovoid, with a length of 1-2 cm or slightly longer, the head is round or obtuse, the base is wedge-shaped, subsessile, and entire; Fertile leaves are tongue-shaped or oblanceolate, 3-6 cm long and less than 65438 0 cm wide, with narrow base and few or short stalks, sometimes the same shape as sterile leaves, fleshy, leathery after drying, smooth upper surface and sparse scales below. Sporocysts are round and arranged along both sides of the main vein, between the main vein and the leaf margin.