Herbaceous perennials are plants that live for more than two years and have non-woody stems. They die back to the ground each year but regrow from the same root system. Examples of herbaceous perennials include hostas, daylilies, and black-eyed susans. These plants are often used in gardens and landscaping due to their ability to provide color and texture year after year. They are also relatively low maintenance compared to other types of plants. Overall, herbaceous perennials can add beauty and interest to any outdoor space.