Chloris barbata Sw.

Mayotte: Chloris barbata flowers from September to May and fruits from October to June.

French Guiana: Chloris barbata is a heliophilic species common to gardens and wastelands; it can also be found on the dikes of the Mana rice polder.
Madagascar: C. barbata is a ruderal plant colonizing roadsides and locations near homes and weed of rainfed crops on light relatively fertile soils (alluvial soils and ferruginous soils or down slope). Its range is limited to the wetland and sub-humid Northwest of the island.
Mauritius: Ruderal species, growing on roadsides. It is fairly common.
Mayotte: Chloris barbata is an exotic anthropophilic species, very commonly naturalized in degraded areas of a wide range of environments. It grows as well on sands as in clayey ditches of wetlands, it is present in gardens, crops, pastures and roadside banks.
Reunion: This species grows up to 800 m altitude in the windy region and up to 1000 m altitude in the downwind area. It is not very demanding and also grows as well on fertile alluvial as on sands.
Seychelles: Species occurring on road edge and unoccupied land. It is rarely abundant.
West Indies: Chloris barbata is an exotic species. It is a heliophilous species frequent along roadsides, in fallows and fallow lands. It is not very demanding in terms of soil quality and is more abundant on sandy and stony soils. It tends to disappear from damp and shady areas. 

Local harmfulness
 
French Guiana: Species occasionally observed in fruit plots or in recent places where the forest has been slashed, never abundant.
Madagascar: Chloris barbata is a species relatively infrequent and often scarce in rainfed crops.
Mauritius: A weed rarely found in crops, low harmfulness.
Reunion: C. barbata is essentially a forage grass. It rarely gets into sugarcane fields. It is found as a ruderal species along roads, near houses and in fallow. It sometimes infests the edges of vegetable cultivation.
Seychelles: A weed of low harmfulness.
West Indies: Chloris barbata is a weed present in all crops except shaded banana plantations. It is not very harmful to sugarcane, fruit and vegetable crops. It is very frequent in orchards because mechanical weeding easily favours its establishment without affecting the development of the trees. It participates in the formation of a spontaneous plant cover by cohabiting easily with other grasses. 

Fodder: In Reunion, Chloris barbata is essentially a forage grass

Herbarium pictures ReCOLNAT: https://explore.recolnat.org/search/botanique/simplequery=Chloris%2520barbata