树木营养器官在分类上的研究与应用

应用营养器官进行树木分类是一种理想的新尝试 ,其目的是要改变以生殖器官为主的传统分类方法 ,使之更富于实用性。为此作者对我国 2 1 2科 1 4 0 0余属 ,近 1× 1 0 4 种树木的叶及叶脉、枝条、髓心的质地和结构、维管系统 (叶隙、叶迹 )、芽体及叶痕等进行了较为深入的研究 ,认为我国树木营养器官可分为 7个类型 ,并对每个类型进行了科属 (含种群 )综合检索表及各科分属检索表的编制工作 实践证明只要能确切掌握树木的各个分类依据 ,这种设想是完全可以实现的。还以植物界各个分类层次 (门、亚门、科、属 )为基础 ,从营养器官上作了总结、归纳和分析 ,而且分析了脉序式样和维管系统在植物系统发育中的指示作用 ,补充和丰富了传统分类理论

RESEARCH AND APPLICATION OF TREE VEGETATIVE ORGANS TO TREE CLASSIFICATION

This is an attempt to classify trees according to their vegetative organs, aiming at the purpose of finding an easier and more practical way to identify trees than the traditional method according to their propagative organs.Nearly 10,000 spicies from more than 1400 genera of 212 families in China have been extensively investigated in reference to the leaf blade and leaf vein, the branches, the pith structure and medium, vascular system (mainly leaf gap and leaf trace), bud body and leaf scars.The results indicate that the vegetative organs of Chinese trees can be classified into 7 types. To make further researches for the reliabitity of the vegetative organ classification of trees, a comprehensive key for families and genera (including species groups) in each type and the key to the genera of each family has been made for ready use.Practice shows that this attempt is completely realizable so long as we can accurately master each above\|mentioned basic characters in classifying the trees.The study finally has made some general conclusions according to the vegetative organs and put forward some valuable views on the basis of the ordinary classification system of the vegetable kingdom(Division, Subdivison, Family and Genus). The study also analyzes the indicative effects of tree venation patterns and vascular system in the systematic development of plants.Additionally there could be a supplementary value to the theory of traditional plant taxonomy at the same time.