Complex sentence: In South Africa it has been cultivated as an ornamental, is often found on roadsides, and has become of concern for its invading of undisturbed climax grassland and wetlands.
Split into simpler sentences: In South Africa it has been cultivated as an ornamental, but has also invaded grasslands and roadsides. It has become of concern for its invading of undisturbed climax grassland and wetlands.