Echinochloa pyramidalis is a species of large grass, occurring naturally in flooded regions and beside lakes in tropical Africa and America, and introduced to various other countries.

[2] Echinochloa pyramidalis is a large, perennial, reed-like grass growing to a height of about 300 cm (10 ft) or even taller.

This is a strong-growing plant with a fasciculated (arranged in bundles) root system and in suitable localities, forms dense stands of even height.

It forms a substantial part of the vegetation in the Sudd, the vast swamp in South Sudan through which the White Nile passes.

Where it has become invasive, as for example in Mexico and Guyana, it reduces biodiversity and grows so vigorously that it displaces native plants.