Oldenlandia umbellata (called chay root or choy root, from its Tamil name, chaaya ver) is a low-growing plant native to India. A colour-fast red dye can be extracted from the root bark of (preferably) a two-year-old plant. Chay root dye was once used with a mordant to impart a red colour to fabrics such as calico, wool, and silk.
This plant is well known in Siddha Medicine for its styptic property. It is also a drug that can be administered for bronchial asthma, as a decoction of the entire plant, a decoction made from its root and liquorice in the ratio-10:4, or the powdered root is given either with water or honey.
A decoction of the root also is a febrifuge.
- "chay root". thefreedictionary. Retrieved 2007-01-15.
- "The in vitro antibacterial activity of Hedyotis Umbellata - Short Communication". Indian Journal of Pharmacological Sciences. Retrieved 2007-01-15.
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