Droseraceae are carnivorous herbaceous plants that may be annuals or perennials. The species may be annuals, biennials or perennials. The herbaceous plants can be annuals, biennials, or perennials, without basal or terminal leaf aggregations. Tomato, sweet potato and bell pepper are tender perennials usually grown as annuals. Smaller annuals and perennials such as the daisy and aster flower through the summer. The herbs are mostly perennials, but some annuals also exist. They can generally either be grouped as annuals or perennials. "Hypericum" species are quite variable in habit, occurring as trees, shrubs, annuals, and perennials. Cultivated cottons are perennial shrubs most often grown as annuals. Some species of "Scabiosa" are annuals, others perennials. It contains more than 200 species of annuals and perennials. Winter annuals die after flowering and setting seed. They are biennial or perennial plants, rarely annuals or subshrubs, growing to tall. Parsnips are biennials, but are normally grown as annuals. Cultivated species and weedy annuals have been introduced worldwide.