Neela Amari (Indigo ferra Tinctora) - Ayurvedic Medicinal Herbs Neela amari (Indigofera tinctora) or neelamari is a perennial woody shrub that reaches the height of up 35 inches. It is used in the cure for nervous disorders, epilepsy, and used as an ointment for piles. Decoctions prepared from the root of the plant are used for urinary problems. Indigofera tinctora belongs to the family Fabaceae (Leguminosae).