Vines to 5 m. Stems hollow, stri­ate, sparingly to densely stri­gose or thinly hirsute. Leaves: stipules triangular, 2–5 mm, margins entire; petiole 4–6 cm; rachis 0.7–1.2 cm; stipels linear to ovate, 0.5–1.3 mm; leaflet blades broadly lin­ear, lanceolate, rhombic, or ovate-oblong, base rounded, apex usually acute, sometimes acuminate, 4–12 × 1–4 cm, surfaces glabrous or puberulent abaxially. Inflorescences spherical to ovoid, to 30 cm; rachis with ± 25 prominent and glandular nodes, nodes 2-flowered; primary bracts deciduous, ovate. Pedicels 2–5 mm; brac­teoles deciduous, ovate to lanceolate-ovate, 2–4 mm, apex acute. Flowers: 2.5–3 cm; calyx 6–8 mm, glabrous or sparsely pubescent, tube 4 mm; lower lobe narrowly triangular, 2–3.5 mm; lateral lobes curved, triangular-falcate, 2–4 mm; upper lobe broad and emarginate; ban­ner suborbiculate, 1.6–2.5 cm diam.; wings obliquely obovate, 2–3 × 1 cm, claws 5–6 mm; keel base broad, incurved distally into a tight coil of 2–2.5 turns, claw 6–7 mm; vexillary stamen thickened distal to base; ovary linear to slightly curved; style coiled like keel, style with a brush of hairs proximal to stigma. Legumes slightly pendent, 7–12 × 0.8–1 cm, strigose to short-pilose on valves, densely and minutely barbed on margins. Seeds reddish brown, turgid, 4–7 × 5 mm. 2n = 22.

Phenology: Flowering Jan–May.
Habitat: Pine forests, rocky soils, dis­turbed areas.
Elevation: 0–20 m.

Distribution

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Introduced; Fla., Mexico, West Indies, Central America, South America, introduced also in Asia, Africa.

Discussion

Leptospron adenanthum is introduced in southern peninsular Florida (R. P. Wunderlin and B. F. Hansen, http://florida.plantatlas.usf.edu/).

Selected References

None.

Lower Taxa

None.