[1][4] Megathyrsus maximus grows naturally in open grasslands, usually under or near trees and shrubs and along riverbanks.

The species has broad morphological and agronomic variability, ranging in height from 0.5 to 3.5 m (1.6 to 11.5 ft), with 5–10 cm (2.0–3.9 in) stems.

It is well suited for cut-and-carry, a practice in which grass is harvested and brought to a ruminant animal in an enclosed system.

The leaves contain good levels of protein (6–25% depending on age and nitrogen supply).

In some places, such as South Texas, Sri Lanka[6] and Hawai'i,[7] it is an invasive weed that suppresses or displaces local native plants and is a fire hazard.