Retired professor of math and computer science having taught for 36 years at a state supported university in Virginia. United States Senators serve a term of six years in office. There is no limit on how many terms a Senator can be elected to serve.
Herbaceous perennials are garden plants that die back to the soil line when winter temperatures arrive. The plants enter a dormant period and strengthen the root system while waiting for the coming of spring.
some relatively fast growing herbaceous plants especially annuals are pioneers or early successional species others form the main vegetation of many stable habitats occurring for example in the ground layer of forests or in naturally open habitats such as meadow salt marsh or desert