Rausch.Synonym: I. arundinacea Cyr.Family: Gramineae; Poaceae.
Habitat: The hotter parts of India, both in plains and hills, ascending up to 2,300 m in the Himalayas.
English: Thatch Grass.Ayurvedic: Darbha, Suuchyagra, Yagnika, Yagyabhuushana, Bahir.Siddha/Tamil: Dharba.Folk: Daabh.Action: Diuretic, anti-inflammatory.
The rhizomes contain flavonoids, together with lignans, graminone A and B. A sesquiterpenoid, cylindrene, and biphenylether compounds, cylindol A and B, are also reported.Cylindrene and graminone B show inhibitory activity on the contractions of vascular smooth muscles and aorta of rabbit respectively; while cylin- dol A exhibits 5-lipoxygenase inhibitory activity.The hot aqueous extract of the rhizomes show moderate GTP activity on primary cultured rat hepatocytes intoxicated with carbon tetrachloride cy- totoxicity.The leaves and stem contain cyano- chroic constituents. The roots contain antibacterial substances. The root is used in fevers but does not possess antipyretic activity.Dosage: Root—50-100 ml decoction. (CCRAS.)