Psoralea arborea Sims

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/34953/9900614

Conservation

DD - data deficient

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation

Predicted extinction risk: not threatened. Confidence: confident

Leguminosae, B. Verdcourt. Flora Zambesiaca 3:6. 2000

Morphology General Habit

Woody shrub or subshrub 1–3.5 m tall; branches striate, hairy or glabrous.

Morphology Leaves

Leaves 5–7(9)-foliolate; leaflets 10–50 × 1.5–4(6) mm, linear-oblong to linear-lanceolate, apiculate at the apex, cuneate to narrowly rounded at the base, densely gland-dotted, glabrous to sparsely pubescent; stipules separate, thickened, 2.5–4 × 2 mm, ovate-lanceolate, acuminate.

Morphology Reproductive morphology Inflorescences

Peduncles 15–25 mm long, 1-flowered, fasciculate, 1–3(6) together, axillary in upper leaves and terminal, pubescent with black hairs; 2 bracts at the apex united to form a cup around the peduncle, c. 3 mm long, split on one side, at first close to calyx base but later distant when the true pedicel elongates, bristly pubescent with black hairs.

Morphology Reproductive morphology Flowers Calyx

Calyx tube 6 mm long, lobes 4–5 × 3 mm, oblong-ovate, subequal, subacute or rounded at the apex, the lowest the largest, both tube and lobes glabrous to pubescent on the outer surface (and lobes within) with characteristic black hairs; margins of lobes ciliate.

Morphology Reproductive morphology Flowers Corolla

Standard dark violet or blue, paler at the margins, 13–15 × 12–15 mm, broadly obovate with white claw 4 mm long; wings white below and pale violet in the upper half, 12.5–13 × 4–6 mm with claw 7 mm long; keel about as long, white, apically suffused with dark violet-purple.

Morphology Reproductive morphology Flowers Androecium Stamens

Vexillary filament shortly united with staminal sheath at the base.

Morphology Reproductive morphology Flowers Gynoecium Pistil

Ovary c. 3 mm long with stipe 1 mm long; style straight for c. 7 mm then curved upwards for 4 mm.

Morphology Reproductive morphology Fruits

Fruit 6 × 3.8 mm, ellipsoid, wrinkled; seed dark brown, 4.2 × 3 mm, ellipsoid; hilum 1.2 mm long.