Wrightia tinctoria, Pala indigo plant or dyers’s oleander, is a flowering plant species in the genus Wrightia found in India, southeast Asia and Australia. Various parts of the plant have medicinal properties.
It has astringent, anti-inflammatory and antibacterial properties, is effective in treating various skin disorders. It is also a potent antidandruff agent, which is beneficial in treating scalp disorders. It is used for psoriasis and other skin diseases.
It is a medicinal plant in Ayurveda described in classical Ayurvedic texts as Shwetha kutaja and seeds known as Indrayava. It is also known from Unani and Siddha systems as Inderjao shireen and Irum-paalai respectively. According to Ayurveda, the bark is useful in treatment of diarrhoea, piles, ringworm and other skin diseases. Seeds also have anti-dysenteric properties and are also used as astringents, antihelminthics, aphrodisiacs and to reduce fevers. Bark and seeds are used to treat flatulence. Root bark extract is used orally as an antidote for snakebite.Powder of the bark is also used for treatment of kidney stones. Its stem bark extract is used in animals for the treatment of Anthrax.