Native to North America, and widely distributed throughout the United States and south into South America.
A perennial grass that propagates quickly by underground rhizomes and aboveground stolons. It favors semi-aquatic habitats, such as marshes, poorly drained pastures or meadows, and occasionally lawns. It also is a problem in drainage and irrigation ditches.
Reproduction also is from seeds.
Mature plants can form mats over large areas, and can grow to around 2 feet high. Thick, heavy stolons run over the soil, producing thick roots at their nodes, and leading to many stems and thick cover of leaves.
Leaves are about 1/2 inch wide and up to 6 inches long. The stolons can grow laterally under the surface of the water, and when the water recedes can begin to send out new roots, quickly expanding the growth.
The flower head is a distinct panicle with 2 branches on top, forming a V-shape. Rarely, a third branch will occur below the top two. The flowers are arranged on the branches in 2 densely packed rows.
Characteristicts Important to Control:
A perennial grass propagating by stolons and rhizomes. Extremely wet areas are favored.