北京大学：《植物生物学 Plant Biology》精品课程教学资源（电子教案）第12讲 花

花的形态与结构 Morphology and structure of Flower anther (w poll stigma grains, filament sty -petal stamen ovary (collec tively corolla) d ovule fegg sepal integument (collectively calyx) perianth pistil receptacle dice

花的形态与结构 Morphology and Structure of Flower

Stamen Stigma Filament Anther Style PIstil Oval Petal (corolla Pollen Placen Ovule locule Sepal (calyx) Ovule Ovary Wall Receptacle

Pedice花梗 Variation of pedicel length

Pedicel 花梗 Variation of pedicel length Cherry blossom Peach flowers

花托的类型 Types of Receptacles filament. signal Lyle O ovary I Carpels Stamens epta

花托的类型 Types of Receptacles

花被 Perianth 花被——指一朵花中花萼和花冠的总称 ●双被花(二被花) double perianth flower 朵花中同时具有花萼和花冠 单被花 simple perianth flower:仅有花萼没有 花冠或花萼和花冠分化不明显 ●无被花:一朵花中既没有花萼,也没有花冠

花被 Perianth 花被—— 指一朵花中花萼和花冠的总称 指一朵花中花萼和花冠的总称 z 双被花（二被花） 双被花（二被花）double perianth perianth flower：一 朵花中同时具有花萼和花冠 朵花中同时具有花萼和花冠 z 单被花 simple perianth perianth flower：仅有花萼没有 花冠或花萼和花冠分化不明显 花冠或花萼和花冠分化不明显 z 无被花：一朵花中既没有花萼，也没有花冠 无被花：一朵花中既没有花萼，也没有花冠

Double perianth flower双被花

Double perianth flower 双被花

Simple perianth flower单被花: Magnolia denudata

Simple perianth flower 单被花：Magnolia denudata

Non-perianthial flower 无被花: poplar杨树 A: a male flower of poplar B: a male flower with stamens removed 1. Flower disc 2. Bracts 3. Stamen B

Non-perianthial flower 无被花：poplar 杨树 A: a male flower of poplar B: a male flower with stamens removed 1. Flower disc 2. Bracts 3. Stamen

Regular or actinomorphic flower a population of buttercup A inflorescence and flowers of a buttercup

A population of buttercup A inflorescence and flowers of a buttercup Regular or actinomorphic flower

Bauhinia sp 羊蹄甲属植物 rregular or zygomorphic flowers

Bauhinia sp. 羊蹄甲属植物 Irregular or zygomorphic flowers