The ligules are rounded to acute and tall . The inflorescence is typical of the bentgrasses. The glumes are longer than the florets in each spikelet. Redtop is very similar to bentgrass but does not have surface stolons and is sometimes bluish gray in color. It is tolerant of a wide range of soils and moisture conditions and will thrive in acidic or porous soils.
Perennial ryegrass is a cool-season bunchgrass found throughout the United States.
It is well adapted to medium maintenance. It is generally less tolerant to environmental extremes than Kentucky bluegrass, however, and is used principally in mixtures with other turfgrass species. As a very small percentage in a mixture, perennial ryegrass can become a serious weed. Perennial ryegrass is an excellent seedling competitor and can dominate in a mixture. While it tolerates a wide range of soil and environmental conditions, heat, cold, and drought can take their toll on perennial ryegrass stands.