Indigofera arrecta Hochst

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.

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 cylindol 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.

Family ► Fabaceae.

Habitat ► Cultivated in Assam, Bihar and in parts of Uttar Pradesh.

English ► Natal Indigo, Java Indigo, Bengal Indigo.

Ayurvedic ► Nili (related species).

Aqueous extract of the plant exhibits antihyperglycaemic activity in rats due to insulinotropic property.

The indigotin content of the plant (0.8-1.0%) is higher than that of other species of Indigofera. The leaves contain up to 4% of a flavonol glycoside which on hydrolysis yields rhamnose and kaempferol.

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