Erect to prostrate shrublet to 1 m. Leaves unifoliolate, alternate to opposite on flowering branches, linear to orbicular. Flowers solitary or crowded, wings smooth, keel obtuse to ± rostrate and often subapically lobed, calyx lobes triangular to narrowly triangular, upper lobes broader than the others. Pods stipitate, oblong to broadly oblong or obliquely lanceolate.