- 更多网络例句与具二回羽叶的相关的网络例句 [注：此内容来源于网络，仅供参考]
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As a result of analysis to many of the results of experiment, checked up on specimens, field investigation and combining with the theories of palaeobotany, comparative morphology, evolutional morphology of vascular plants and taxonomy, it can be concluded as following: the primitive sorts of Cycadaceae are the sorts that pinnate leafs are dichotomy; among these, the sort that pinnate leafs are tripinnate-dichotomy is most primitive, from this sort gradually evolve to bipinnate-dichotomy, to only for monopinnate-dichotomy, from this sort evolve to the sorts that pinnate leafs are simply pinna; among the sorts of simply pinna, the species that segments of megasporophyll possess much more triplicate to monodichotomy are most primitive.
经过大量的实验结果分析、查阅标本和野外调查，结合古植物学、比较形态学、演化植物学和分类学等理论进行分析，认为苏铁科原始的类型为羽叶呈二歧状分叉的种类，其中最原始的又是羽叶呈三回二歧状分叉的种类，从这个羽叶类型逐渐演化出一回二歧状分叉的羽叶类型，再演化出羽叶为单羽状的类型；而单羽状叶的类群中，又以大孢子叶侧裂片具三回、二回及一回二歧状分叉数量多的种类为最原始，而侧裂片二歧状分叉数量少的为较进化，侧裂片无二歧分叉的如拳叶苏铁类为最进化的种类。
- 更多网络解释与具二回羽叶的相关的网络解释 [注：此内容来源于网络，仅供参考]
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Koelreuteria：栾树属
复羽叶栾树(Koelreuteria bipinnata Franch)又名国庆树,为无患子科(Sapindaceae)栾树属(Koelreuteria)落叶乔木. 树高可达20m,树冠近圆球形,树皮灰褐色. 小枝稍有棱,有明显突起的皮孔. 二回羽状复叶,羽片5-10对,长椭圆形,边缘具不整齐尖锯齿.