-Plants (Kingdom Plantae)

-Vascular Plants (Phylum Tracheophyta)

-Flowering Plants (Subphylum Angiospermae)

-Dicots (Class Magnoliopsida)

-Legumes, Milkworts, and Allies (Order Fabales)

-Legumes (Family Fabaceae)

-Subfamily Faboideae

-Tribe Amorpheae

-Kidneywoods (Genus Eysenhardtia)

-Mexican Kidneywood (Eysenhardtia polystachya)

Eysenhardtia polystachya is a much-branched, deciduous shrub or small tree usually growing 1.5 - 5 metres tall, occasionally reaching 7 metres. This species has long been highly valued in Mexico for the medicinal properties of its wood, to which is ascribed an almost miraculous ability to cure kidney and bladder ailments. Eysenhardtia polystachya is native to the subtropical and tropical regions of Mexico.