Swainsona incei is a species of flowering plant in the family Fabaceae and is endemic to inland Western Australia. It is an erect or ascending annual, sometimes perennial herb with imparipinnate leaves with 5 to 9 lance-shaped to elliptic leaflets, and racemes of 2 to 30 purple flowers.
Swainsona incei is an erect or ascending annual, sometimes perennial herb, that typically grows to a height of about, sometimes to and has many strongly ridged stems wide. Its leaves are imparipinnate, mostly long on an elongated petiole with 5 to 9 lance-shaped to elliptic leaflets mostly long and wide. There are stipules long at the base of the petiole. The flowers are arranged in racemes long with 2 to 30 flowers on a peduncle wide, each flower long on a softly hairy pedicel long. The sepals are joined at the base, forming a tube about long, the sepal lobes equal to or longer than the tube. The petals are purple, the standard petal long and wide, the wings long, and the keel long and deep. Flowering occurs from July to September, and the fruit is a narrowly oval pod about long and wide with a short stalk and the remains of the style about long.[1]
Swainsona incei was first formally described in 1910 by William Robert Price in the Bulletin of Miscellaneous Information from specimens collected by W.H. Ince, probably on "Mt Sir Samuel, near Lawlers".[2] The specific epithet (incei) honours Walter Holinshed Ince and/or his sister Miss M.B. Ince.[3]
This species of Swainsona grows on well-drained sandy or gravelly soil in the Carnarvon, Coolgardie, Gascoyne, Murchison and Pilbara bioregions of inland Western Australia.