There's the cereal grass rye, and other rye grasses include the following:

• Altai Wild Rye
• Russian Wild Rye
• Italian Rye-grass
• Annual Rye-grass
• Winter Rye-grass
• Perennial Rye-grass

The top two are a coarse grass that is commonly used for stock-pile grazing cattle in late fall to winter. The last four are annual grasses that are primarily grown as a temporary tame grass for pasturing cattle in the summer months when other cool-season grasses like smooth brome, crested wheatgrass, timothy, orchard grass and intermediate wheatgrass have all gone into dormancy for the hot summer days. This is primarily for regions like Northern and Northwestern USA and Canada that graze cattle.