This member of the Pedaliaceae family was given this name by Otto Stapf in 1895. It is found in northern to western Madagascar, growing in a rich and well drained soil with quite some water water and some sun. The swollen stem can grow to fifteen centimetres in diameter and reach for one to three metres. The flowers are yellow. The genera is named for the Uncarina tribe of Madagascar. The species name means 'round shield', referring to shape of leaf and position of stalk in centre of the leaf.

