Paspalum scrobiculatum L.

Mayotte: Paspalum scrobiculatum flowers from September to March and fruits from October to April.

Paspalum scrobiculatum is a vivacious grass, but it can also behave as an annual species. It multiplies vegetatively by emergence of rhizomes. It also produces seeds.

Characters to distinguish several Paspalum species
 

Northern Cameroon: Paspalum scrobiculatum presents no preference for a particular climate in tropical region, provided the ground is very wet even temporarily flooded. It is a species typical of heavy clay and very humid soils like vertisols, recent alluvium along water bodies, the planosols and marshland areas. This species is common and sometimes abundant during the offseason, in temporarily flooded plots.
Comoros: Species frequent in areas with heavy, wet soils, up to 1000 m altitude.
Madagascar: ruderal and weed species common in almost all climatic regions of Madagascar, it rises up to 2000 m altitude. It adapts to various stations and grows on various types of soils even in very poor and eroded soil, in fallows, along the edges of roads and canals and also in rainfed crops (cassava, upland rice, peanuts).
Mauritius: Species widespread at high altitude in humid region. It grows on roadsides, in savannas and occasionally in crops.
Mayotte: Paspalum scrobiculatum is a native species quite common in natural wetlands and also growing in ditches, crops and urban areas.
Reunion: Species rare, present mainly in altitude above 1000 m.
Seychelles: Species present in fallows, rarely abundant.

Local harmfulness

Burkina Faso: Paspalum scrobiculatum is common and usually abundant in paddy fields.
Northern Cameroon: This is a minor weed of rainfed crops such as cotton, maize, sorghum and groundnuts as they are not cultivated on very moist soils. However, P. scrobiculatum is a major weed in irrigated rice crops and lowland rice. This species is a serious problems of invading in the offseason sorghum crops on temporarily flooded plots
Comoros: A major weed of maize, rice, banana and cassava.
Ivory Coast: Frequent and usually abundant in rice.
Ghana: Frequent and usually abundant in rice.
Madagascar: Species of low to medium frequency depending on region, but generally scarce.
Mali: Rare and scarce in rice.
Mauritius: A weed of low harmfulness, being present in small quantities in crops.
Mayotte: Paspalum scrobiculatum is an uncommon weed, present in only 1% of cultivated plots. It is mainly found in food crops. It can also be found in vegetable crops. It is present mainly in the south of the island.
Nigeria: Frequent and usually abundant in rice.
Reunion: A weed present in 11% of cultivated plots. It appears mainly in pastures of altitude or in sugar cane on the very humid east and south coasts.
Senegal: Rare but abundant when present in rice.
Seychelles: A weed of low harmfulness.
Tanzania: Frequent and not usually abundant in rice.
Chad: Rare but abundant when present in rice.

For vivacious grass weed control tips irrigated rice and lowland in Africa, visit: http://portal.wiktrop.org/document/show/34

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