[The identification of bristle grass species of rice fields [Echinochloa spp.]]

amande de la graine arrozales cariossidi classification classificazione echinochloa especies espiguilla fenotipi fenotipos feuille foglie fusti germen gluma glume glumes hojas identification identificazione infiorescenze inflorescence inflorescences inflorescencias kernels leaves malezas mauvaise herbe oryza sativa phenotypes piante infestanti rice fields risaie specie species spighette spikelets stems tallos tige weeds