Perennial ryegrass is a member of the Lolium genus of the Poaceae family.(Lolium)Plants, approximately10Variety.Clumped growth, with a well-developed root system; hair roots mainly distributed15In the topsoil layer of centimeters, there are numerous tillers, and under single-stem cultivation, it can reach250-300A or more. Stalks are upright, tall.80-100Centimeters. Leaf narrow and long.4-12centimeters, width2-4Millimeters, pale green, folded when young; leaf auricles small; ligule small and obtuse; sheath split or closed, length equal to or slightly longer than internode, near ground sheath red or purplish-red. Spike slender and long, up to30centimeters; each spike contains small florets7-11Flattened, slightly smaller seeds. Outer husk long.4-7Millimeters, rounded back, with veining5Strips, thin, blunt-ended, without awns or nearly so; lemma and palea of equal length, tip acute, translucent texture, veins near the edge, with fine hairs along the rim.