實驗花的構造ppt課件-文庫吧資料
2025-05-09 22:07本頁面
【正文】 子葉 胚芽 胚軸 胚根 珠被 受精卵 受精極核 六、果實 Fruit 果皮 pericarp 種子 seed 子房壁 胚珠 外果皮 中果皮 內(nèi)果皮 以果實成熟時果皮的性質(zhì)，分為肉果和干果： 肉果 漿果 berry 核果 drupe 梨果 pome 瓠果、柑果 干果 裂果： 莢果 legume Dehiscent 蓇葖 follicle 蒴果 capsule 角果 閉果： 瘦果 achene indehiscent 翅果 samara 堅果 nut 穎果 caryopsis 。 the smaller ones are two species of Wolffia, up to 1 milli meter long. (b) A flowering plant of W. borealis, with a circular concave stigma (looking like a tiny doughnut) and a min ute anther just above it, both protruding from a central cavity. The whole plant is less than 1 millimeter long. (c) Flower ing plant of L. gibba。第五章 植物器官的結(jié)構及組織分化 四、花 Flower The duckweeds (family Lemnaceae) are the smallest flowering plants。 their struc tural features mark them as extremely reduced relatives of the aroid family (Araceae), the family that includes calla lilies (Zantedeschia) and Philodendron. (a) A honeybee resting on a dense float ing mat of three species of duckw
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