Native from Africa, those are weeds are generally found mainly on the periphery of sugarcane fields or in the pineapple fields of the south and north-east of the island.
Originally foreign and rude locally for most part of the low altitude regions (roadsides, hedges, undergrowth of filaos), it invades certain sites of native coastal vegetation which grow on pebbles or on sand dunes.
It is an invasive species which form layers and suffocate the native vegetation of the herbaceous stratum.
Its introduction into the Pacific islands has caused significant disturbances in native ecosystems.
It also poses grassing problems in sugarcane and pineapple fields (high nutrient absorption from the soil and its aptitude to stifle other species).