<正>在采用抽样调查方法对遵义市区行道树进行调查的基础上，分析遵义城区行道树的分布格局及其树种多样性特点。并提出合理的管理措施建议。结果表明：（1）遵义城区行道树共有23种，其中桂花、女贞、杨树、广玉兰、悬铃木、柑橘等6个树种株数占总数的85.54%，总树种多样性指数为0.924；（2）行道树平均胸径偏低，胸径<10cm的树木占47%；（3）行道树总生物量约为1500t，相当于18.9hm2的森林，总叶面积为1018.67×103m2。

A 250-year history of the plant classification of the genus Malus Miller was reviewed. After discussing the main taxonomic systems, and thoroughly studying the significance and the researching status of experimental taxonomy on this genus, the plant chemical taxonomy a’nd molecular systematic taxonomy were considered as the important additional evidences for the systematic study on this genus. And the taxonomic system of the genus was not a perfect one,more experimental evidences should be adopted to analyse it furthermore. Finally, the systematic evolutional ways were also discussed, South-east Yunnan, Southwest Guangxi, North Laos and North Vietnam were regarded as the origin center of this genus.