Flower, is the reproductive organ of most seed-bearing plants. Flowers carry out the multiple roles of sexual reproduction, seed development, and fruit production. Many plants produce highly visible flowers that have a distinctive size, color, or fragrance. Almost everyone is familiar with beautiful flowers such as the blossoms of roses, orchids, and tulips. But many plants — including oaks, beeches, maples, and grasses — have small, green or gray flowers that typically go unnoticed. Whether eye-catching or inconspicuous, all flowers produce the male or female sex cells required for sexual reproduction. Botanists call the cone — bearing plants gymnosperms, which means naked seeds; they refer to flowering plants as angiosperms, which means enclosed seeds. Flowers typically are composed of four parts, arranged in concentric rings attached to the tip of the stem. From innermost to outermost, these whorls are the (1) pistil, (2) stamens, (3) petals, and (4)sepals.
- reproductive organ [ˈri:prəˈdʌktiv - ˈɔ:ɡən] n.生殖器官
- fragrance [ˈfreiɡrəns] n.香气
- blossom [ˈblɔsəm] n.花簇
- orchid [ˈɔ:kid] n.兰花
- tulip [ˈtju:lip] n.郁金香
- beech [bi:tʃ] n.山毛榉
- eye-catching [ˈaiˌkætʃiŋ] adj.引人注目的
- inconspicuous [ˌinkənˈspikjuəs] adj.不显眼的
- botanist [ˈbɔtənist] n.植物学家
- cone [kəun] n.球果
- gymnosperm [ˈdʒimnəuˌspə:m] n.裸子植物
- refer to [riˈfə: - tu:] v.指的是……
- angiosperm [ˈændʒiəspə:m] n.被子植物
- be composed of [bi: - kəmˈpəuzd - əv] n.由…组成
- concentric [kɔnˈsentrik] adj.同一中心的
- stem [stem] n.茎
- pistil [ˈpistil] n.雌蕊
- stamen [ˈsteimen] n.雄蕊
- petal [ˈpetl] n.花瓣
- sepal [ˈsepəl] n.萼片
