Research progress on chemical compositions and pharmacological activities of Pyrrosia plants.

Genus Pyrrosia plants included many plants like Pyrrosia lingua,Pyrrosia sheareri,Pyrrosia drakeana,Pyrrosia petiolosa,Pyrrosia davidii and Pyrrosia gralla,which were traditional Chinese medicinal plants.Pyrrosia plants all were rich in triterpenoids,flavonoids,xanthones,essential oils and steroids,and their crude extracts and purified compound showed efficacies of good expectorant,antitussive,antibacterial,antiviral,anti-inflammatory,diuretic,antioxidant,immune strengthening and kidney protective etc..Pyrrosia plants had been prepared as many compound preparations and applied in clinic comprehensively up to now.The research advances on chemical components and pharmacological activities of Pyrrosia plants were overviewed in this work,which provided basis for further study and application and development of plants belonging to genus Pyrrosia.