The Manual on Uniform Traffic Control Devices (MUTCD) is approved by the Federal Highway Administrator. as the National Standard in accordance with Title 23 U.S. Code, Sections 109(d), 114(a), 217, 315, and 402(a), 23 CFR 655, and 49 CFR 1.48(b)(8), 1.48(b)(33), and 1.48(c)(2).
The dominant vegetation types are grassy prairie and grass steppe in which numerous species of the grass genus Stipa are particularly conspicuous. Pampas grass (Cortaderia selloana) is an iconic species of the Pampas. Vegetation typically includes perennial grasses and herbs.
Pampas grass is probably one of the most popular species of ornamental grasses. The species is a perennial, warm-season, evergreen grass which forms dense clumps of foliage, and the leaves have sharp razor-like edges. Leaves are from Â½ to 1 inch in width and can range from 1 to 4 feet in length. Plants (foliage and flowers) achieve a height of 4 to 6 feet with similar width. Flowers occur in August with large panicles 6 to 8 inches wide by up to 2 feet long and persist throughout the winter months.