Psoralea odoratissima Jacq.

Robust tall shrub or tree up to 4(6) m tall, reseeder. Stems erect, single, branching from about 1.5 m tall, rigid, yellowish green with numerous white lenticels when young, ageing grey, striate. Seasonal shoots green, shaggy with lax white hairs. Leaves (13)15-19-foliolate, distributed along the branches, incurved and clasping when young but then spreading, petiolate; leaflets 13-19 x 0.5-2 mm, linear lanceolate, deeply channelled abaxially, rounded adaxially, cuneate at the base, tapering thereafter, apex acuminate, tips arching, hairs shaggy, thicker on adaxial midvein; secondary veins sunken, visible; basal pair longest becoming smaller towards the apex, three uppermost pinnately inserted; with many raised glands; petioles 4-5 mm long; rachis 1550 mm long; stipules 2-3 x 1.5-2 mm, 3-4-veined, shorter than but not fused to petiole, persistent, rapidly senescent, semi-erect and inrolled, lanceolate-ovate, acute, ciliate. Inflorescences axillary, borne mainly in the upper axils of seasonal shoots, no leafy extension, pseudo-spicate, lax, three flowers per axil, pedunculate, as long as the subtending leaf, pedicellate; peduncles stout and rigid, 3-6 mm long; cupulum bilobed, hairy, lobes equally developed, triangular; pedicels 2-3 mm long. Flowers 13-14 mm long, white to pale mauve, intensely sweet-scented. Calyx 5-7 mm long, tube 2-3 x 4 mm; lobes unequally developed, longer than the tube, pale green, sparsely covered in small white flat to erect hairs and densely encrusted with mixed sized glands on outside; margins of teeth densely black ciliate, inside of teeth densely stubby black-haired. Standard petal 10-11 x 8-10 mm, broadly ovate, white to pale mauve with purple nectar guide at the crotch, back of standard darker; claw 3-4 mm long. Wing petals 10-11 x 3-3.5 mm, white with auricles well developed, sculpturing present, basal comprised of 2-3 rows of 10-12 transcostal lamellae; claw 3-4 mm long. Keel 9-10 x 2-3 mm, white, apically suffused with dark violet-purple on inner face; claw4-5 mm long. Androecium 10 mm long, tenth stamen free, scarcely fenestrate. Pistil 8 mm long, stipitate; ovary 1 mm long, glabrous, sparsely covered in club-shaped glands; style 6 mm long, straight then upcurved, height of curvature 3 mm long, thickened at point of flexure. Fruits 4-5 x 2.5-3.0 mm, oblong. Seeds 2-4 x 2 mm, dark brown to black.