Scientific name Pithecellobium dulce Description Attractive fast-growing tree that has been planted as an ornamental. Grows up to 20m high. Most specimens have a pair of short sharp spines at the base of each leaf. Flowers in small white heads 1cm in diameter. Mature seed pods are pinkish. Produces many seeds. Habitat Drought tolerant. Grows on poor soils in dry climates and along coastlines including areas where its roots are in brackish or salt water. Distribution Native to a large region of America extending from southern California through Mexico and Central America into Columbia and Venezuela. Life cycle Propagation is by seed or cuttings. Germination takes place in 1-2 days. Spread Spreads by seeds or cuttings. Impacts Environmental Destructive weed that forms dense thickets. Out-competes desirable native vegetation. Economic Invades pastures. Potential to spread quickly across vast tracts of tropical and subtropical areas and become costly to agriculture and the environment. Prevention The best form of weed control is prevention. Treat weed infestations when they are small - do not allow weeds to establish.