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.
Major plant communities in this biome include: Forest: Mediterranean forests are generally composed of broadleaf evergreen trees, such as the oak and mixed sclerophyll forests of California and the Mediterranean region, the Eucalyptus forests of Southwest Australia, and the Nothofagus forests of central Chile.uch of the woody vegetation in mediterranean-climate regions is sclerophyll, which means 'hard-leaved' in Greek. Sclerophyll vegetation generally has small, dark leaves covered with a waxy outer layer to retain moisture in the dry summer months.