花程式的表達為直觀、簡捷地表達植物花的結構,常用以下兩種方式。花程式:用花的各部分的英文或拉丁文的第一個字母來表示花各部,並按從裡到外的原則描寫花的構造。以薔薇科蘋果屬和蝶形花科刺槐屬的花程式為例來解釋:蘋果屬(malus)*ca5co5a∞g(5:5:2)或*k5c5a∞g(5:5:2)刺槐屬(robinia)↑ca5co5a10g(1:1:∞)或↑k5c5a10g(1:1:∞)*=花冠輻射對稱(actinomorphic);↑=花冠兩側對稱(zygomorphic;♂=雄花(maleunisexualflower);♀=雌花(femaleunisexualflower);ca(k)=花萼(calyx:orwhorlofsepals);co(c)=花瓣:(corolla:orwhorlofpetals);caco或p=花被(perianth:ifsepalsandpetalsarealiketermed"tepals");a=雄蕊(群)(androecium:orwhorlofstamens);g=雌蕊(群)(gynoecium:orovarybearingcarpels);∞=多數(many);數字=花各部數目;g()=心皮合生(fullyfusedcarpels);g=子房上位(ovaryinferiortoinsertionpointoftheotherwhorls.thefloralwhorlsarehypogenoustothegynoecium);g=子房下位(ovaryinferiortoinsertionpointoftheotherwhorls.thefloralwhorlsareepigynoustothegynoecium);g=子房半下位(ovaryinferiortosuperior-variationexistswithinthefamily;orhalfinferior);cacoorcoa=花萼與花瓣或花瓣與雄蕊聯合(adnate;orfusionoftwodifferentfloralwhorls)。花程式可能是:k(5),c1+2+(2)a(9)+1,g1∶1∶∞具體可參考: http://baike.baidu.com/view/542707.htm
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