Psoralea abbottii C.H.Stirt.

Decumbent resprouting suffrutex. Stems 1 many, trailing, flexuous, branching at or near the base, up to 1.5 m long. Seasonal shoots dark green, smooth, glabrous. Leaves (3)5-7-foliolate, petiolate, stipulate, patent or spreading, distributed along the branches; leaflets 15-25 x 0.3-0.5 mm, linear, smooth, glabrous, dull dark green, terminal leaflet shortest, basal pair longest, three uppermost digitately inserted; petioles 8-8.3 mm long, shorter than terminal leaflet; rachis 10-15 mm; stipules 1.5-2.5 mm long, persistent, glabrous, setose, patent. Inflorescences axillary, borne along the length of seasonal shoots without leafy extension, one-flowered, lax, pedunculate, pedicellate; peduncle 14-15 mm long, subtended by two small free unequal bracts; cupulum terminal on peduncle, trilobed, 1.5-2 mm long, lobes sub-equal, adaxial largest, all acuminate, internal bracts present, solitary, 0.8 mm long; pedicel 4-5 mm long. Flowers 13-14 mm long, mauve with dark purple. Calyx 6-7 mm long, tube 3.5-4 x 4 mm; lobes more-or-less equal, shorter than the tube, sometimes tinged purple, triangular, carinal slightly broader, vexillary lobe slightly fused beyond the tube, inner face black, densely pubescent, glabrous outside, shiny. Standard petal 11-12 x 11-12 mm, very broadly ovate, apex truncate, slightly auriculate; mauve with a dark purple nectar guide above the small appendages; claw 4-5 mm long. Wing petals 13-14 x 3 mm, cultrate and upcurving; claw 4-5 mm long, much longer, but slightly narrower than keel, auriculate, sculpturing present, upper basal, comprised of 8-12 transcostal arches. Keel 9-10 x 3-5 mm, apex acuminate; claw 5 mm long. Androecium 9 mm long, sheath split adaxially, tenth stamen lightly adherent to the right hand base of the sheath margin, fenestrate. Pistil 9 mm long; ovary 1.5 mm long, stipitate; style 6 mm long, straight, then up curved at end, point of flexure thickened, height of curvature 3 mm long; stigma capitate, penicillate. Fruits 4-5 x 2.5-3.0 mm, oblong. Seeds 2-4 mm long, dark brown to black.