Article

Dinebra retroflexa was collected for the first time in Gharb in 2015 and 2017, and in Tadla in 2015. Cenchrus longispinus has been found in sandy soils in Rabat in 1985 and 1988, and in Larache in 2015. Heavy stands of both species observed at the collection sites in 2015 and 2017 suggested that both grasses are considered troublesome weeds in cultivated crops. This paper gives a brief description, distribution, and biology of both weeds.