植物学大戟科介绍.pptVIP

大戟科 Euphorbiaceae, dicotyledonous plants, about 300 genera, 8000 species of the above, all world, China has 66 genera, 864 kinds 大戟科，双子叶植物，约300属，8000种以上，广布于全球，中国有66属，约864种 乔木，灌木或草本。 Trees, shrubs, or herbs. Leaves simple, thin lobular compound leaves, usually alternate; Stipule, containing milk 单叶，稀小叶复叶，常互生；有托叶，多含乳汁 Flowers unisexual, usually small, neat, into poly umbrella, umbrella, total or panicle; Often for absence of flowers, the calyx, sometimes without being or calyx, disc storage; Stamens 1 to most; Ovary superior, usually composed of 3 carpels synthesis, more than 3 room, every room have ovule 1 ~ 2, axial placenta. Capsule, a few berries or drupe 花单性，通常小而整齐，成聚伞，伞房、总状或圆锥花序；常为单被花，萼状，有时无被或萼、瓣俱存；雄蕊1至多数；子房上位，通常由3心皮合成，多3室，每室有胚珠1~2，中轴胎座。蒴果，少数为浆果或核果 重阳木暖温带树种。喜光也稍耐荫，喜温暖湿润的气候和深厚肥沃的砂质土壤，对土壤的酸碱性要求不严。较耐水湿，抗风、抗有毒气体。适应能力强，生长快速，耐寒能力弱 Chongyang wood warm temperate species. Like light or slightly shade-tolerance, xi warm humid climate and deep fertile sandy soil, relaxed acid alkali of soil. The resistance to water wet, the wind resistance, resistance to toxic gases. Adaptability is strong, grow fast, cold resistant ability Deciduous trees, to 15 m tall. Bark brown, longitudinal cracks. Leaflets ovate to elliptic shape ovate, usually 5 ~ 11 cm, apex acuminate, base rounded or nearly cordate, margin finely serrate, both smooth and glabrous. 落叶乔木，高15米。树皮褐色，纵裂。小叶卵形至椭圆状卵形，常5~11CM，先端突尖，基部圆形或近心形，缘有细锯齿，两面光滑无毛。 Flowers small, green, Adrian rodriguez huber -) fernando, flower. 花小，绿色，成总状花序。 Flowers small, green, Adrian rodriguez huber -) fernando, flower. 浆果球形，熟时红褐色。 Tree is graceful, the autumn leaves turn red, gorgeous and dazzing, wind resistant to moisture, growing fast, is a good shade and trees树姿优美，秋叶转红，艳丽夺目，抗风耐湿，生长快速，是良好的庭荫和行道树种。 秋枫 Evergreen trees, up to 40 m, diameter at breast height of 1 m. Crown umbrella, big branch oblique exhibition. Bark gray-brown, longitudinal cracks. Three ternate, lobules ovate to elliptic, long long 7 to 15 cm, leathery, margin with sh