Barmah is near the largest river red gum forest in the world. The River Torrens was known as the Karrawirra Pari (red gum forest river). The park consists of river red gum floodplain forest, interspersed with treeless freshwater marshes. Most snags in these systems are river red gum snags. River red gum prefers soils with clay content. The natural vegetation was woodland of River Red gum and other eucalyptus trees. Cattle grazing was banned in all river red gum national parks in 2015. The Murray River also supports fringing corridors and forests of the river red gum. The predilection of the river red gum for waterways has been a successful evolutionary niche. Hybrids with river red gum ("Eucalyptus camaldulensis") are used to combat salinity. The combined parks are the largest continuous red gum forest in the world. The red gum kino is known to be rich in astringent tannins. The species is also known as the "red gum", for its reddish bark. The noted Barmah River Red Gum Forests owe their existence to the Cadell Fault.