- indigo, indigo plant, Indigofera tinctoria - deciduous subshrub of southeastern Asia having pinnate leaves and clusters of red or purple flowers; a source of indigo dye
--1 is a kind of shrub, bush
--1 is a member of Indigofera, genus Indigofera
--1 has particulars: anil, Indigofera suffruticosa, Indigofera anil