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叶片奇谈

&nbsp&nbsp&nbsp&nbsp披针形&nbsp&nbsp&nbsp长相当于宽的3–4倍,最宽部分在叶片的基部,如桃花。&nbsp&nbsp&nbsp&nbsp三角形&nbsp&nbsp&nbsp叶无端狭窄,底部宽阔,如杨树。&nbsp&nbsp&nbsp&nbsp&nbsp菱形&nbsp&nbsp&nbsp&nbsp叶中部最宽,先端与底部渐尖,如乌桕。&nbsp&nbsp&nbsp&nbsp心脏形&nbsp&nbsp&nbsp与卵形相似,唯叶基部凹陷,如仙客来、紫荆。&nbsp&nbsp&nbsp&nbsp&nbsp针形&nbsp&nbsp&nbsp&nbsp叶细长而似针,如马尾松。&nbsp&nbsp&nbsp&nbsp倒卵形&nbsp&nbsp&nbsp长宽之比约为1:1.5,最宽部分靠近叶片的先端,如海桐等。&nbsp&nbsp&nbsp&nbsp圆形&nbsp&nbsp&nbsp&nbsp长和宽相等,最宽部分在叶片的中间,如虎耳草的叶为心状圆形。&nbsp&nbsp&nbsp&nbsp卵形&nbsp&nbsp&nbsp&nbsp&nbsp长宽之比约为1:1.5,最宽部分近叶片的基部,如苹果、樟树、矮牵牛。&nbsp&nbsp&nbsp&nbsp&nbsp管形&nbsp&nbsp&nbsp&nbsp叶细长而中空,如葱兰。&nbsp&nbsp&nbsp&nbsp&nbsp肾形&nbsp&nbsp&nbsp&nbsp宽大于长,先端圆钝而基部凹陷,如连钱草。&nbsp&nbsp&nbsp&nbsp&nbsp鳞形&nbsp&nbsp&nbsp&nbsp叶细小、似鱼鳞呈覆瓦状排列于小枝上,如龙柏。&nbsp&nbsp&nbsp&nbsp&nbsp以上是我们常见的形状,是不是感觉到植物世界真奇怪啊!&nbsp。&nbsp&nbsp&nbsp&nbsp&nbsp盾形&nbsp&nbsp&nbsp&nbsp叶柄生于叶背中间,如莲。&nbsp&nbsp&nbsp&nbsp朋友们,你们有没有在阅读有关园艺书籍时遇到什么树什么花的叶片是圆形、卵形等形状,哪到底那些形状怎样规定的呢?&nbsp&nbsp&nbsp&nbsp由于叶形很多,所以采用了一整套专用述语,主要按叶片的长宽比例及最宽部分在叶片的位置或按叶片的形象而定。&nbsp&nbsp&nbsp&nbsp倒心形&nbsp&nbsp&nbsp与倒卵形相似,但叶片先端凹陷,如酢浆草。&nbsp&nbsp&nbsp&nbsp椭圆形&nbsp&nbsp&nbsp长宽之比约为1:1.5,最宽部分在叶片的中部,如山茶花。&nbsp&nbsp&nbsp&nbsp条形(线形)&nbsp长相当于宽的4–5倍或更多,且整个叶片的宽度近相等,如罗汉松、水杉。若最宽部分位于近叶的前端,则为倒披针形

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