Hemarthria altissima, commonly known as limpograss, is a perennial, rhizomatous grass species recognized for its distinctive growth habit and ecological presence. It is a member of the Poaceae family, a large and diverse group of grasses that form a fundamental component of many ecosystems worldwide. Limpograss is valued in certain agricultural contexts for its forage potential and its ability to thrive in specific environmental conditions. Physically, Hemarthria altissima is characterized by its decumbent to erect growth form, often forming dense mats or clumps. Stems, also referred to as culms, are typically flattened and can root at the nodes where they come into contact with the soil, facilitating vegetative spread. These stems can reach lengths of up to 1.5 meters, though they often lie prostrate. The leaves are arranged alternately along the stem and are linear to lanceolate in shape, typically measuring between 10 to 30 centimeters in length and 3 to 8 millimeters in width. They are usually smooth and can be a vibrant green color. The inflorescence is a slender, spike-like raceme, usually solitary or in pairs at the apex of the culm or in the upper leaf axils. These spikes are typically 5 to 15 centimeters long and contain numerous small, inconspicuous flowers. The fruit is a caryopsis, a type of dry, single-seeded fruit characteristic of grasses. The native distribution of Hemarthria altissima is primarily in tropical and subtropical regions of Africa. It is often found in moist grasslands, savannas, and along the edges of wetlands and watercourses. In its natural habitat, it prefers well-drained soils but can tolerate a range of soil types, including sandy and clayey loams. Cultivation requirements generally involve warm temperatures and adequate moisture, though it exhibits some drought tolerance once established. It is not typically cultivated as an ornamental plant but is recognized for its use as a pasture grass in some regions due to its productivity and palatability for livestock. Economically, limpograss has been introduced to various parts of the world, including Australia and the Americas, primarily for its value as a forage crop. It is known for its high biomass production and its ability to withstand grazing pressure. Its dense growth can also help in soil stabilization and erosion control in certain landscapes. Ecologically, it can be an important component of grassland ecosystems, providing habitat and food for various invertebrates and small animals. An interesting characteristic of Hemarthria altissima is its ability to form dense swards that can suppress weed growth, a trait that contributes to its utility in pasture management. The flattened stems and rooting at nodes are adaptations that allow it to spread effectively and colonize open ground, particularly in moist environments. This vegetative propagation is a key factor in its persistence and its ability to form extensive stands.