[Wikipedia] Invasive Properties: Leucaena leucocephala is considered one of the 100 worst invasive species by the Invasive Species Specialist Group of the IUCN Species Survival Commission.[11] It is a highly invasive species in the arid parts of Taiwan, The Bahamas, the Hawaiian Islands, Fiji, Puerto Rico, Hong Kong, South Africa,[22] and northern Australia,[23] as well as in northern Malay Peninsula,[2] South America and Southern Europe.[24] The plant is also found in parts of the U.S., including California, Arizona, Texas, and Florida.[25] Leucaena leucocephala wood and bark It grows quickly and forms dense thickets that crowd out all native vegetation.[26] In urban areas, it is an especially unwanted species, growing along arid roadsides, in carparks, and on abandoned land. (link added by Mary Ann Machi)