北庭故城遗址区种子植物区系研究

通过野外调查，采集植物标本和查阅相关文献资料，对北庭故城遗址区及临近区域种子植物区系进行了分析。结果表明：北庭故城遗址区及临近区域共有种子植物122种，隶属于105属37科。科的组成中，属和种都是以单属科和单种科为主体；属的组成中，单种属和寡种属构成属的结构主体。Drude生活型中以草本植物为主，共102种，占总种数的83．60％。在水分生态类型中，以中生植物和旱生植物为主，其中中生植物共73种，占总种数的59．84％；旱生植物33种，占总种数的27．04％。种子植物区系成分在科的水平上以世界分布为主；属的分布区类型中，温带成分占绝对优势，其中北温带分布属是植物区系的核心。在区域气候环境的长期影响下，植物区系表现出典型的温带性质，没有中国特有分布科属。

Studyof the Flora of Seed Plants in Beiting Ancient Town Site Area

This articleanalyzesthe plant area of Beiting ancient town site area and its adjacent areathroughfield investigation ,collection of plant specimens and lirature review .T he results show thatthere are 122 species of seed plants ,belonging to 105 genera in 37 families in Beiting ancient tow n site area and its adjacent area .T he composition of the families ,genera and species are in a single genus and single as the subject ;the genera ,sin-gle species genera constitute the subject of structure .Drude lives in mainly herbaceous plants ,a total of 102 species ,accounting for 83 .60% of the total species .As forthe ecological type of water ,mesophyteand xero-phyte are the main species ,including 73 species of mesophyteaccounting for 59 .84% of the total species and33 species of xerophytic plantsaccounting for 27 .04% of the total species .The floristic elements of seed plants in the family level to the distribution in the world ;the areal types of genera of temperate zoneoccupies the absolute superiority ,andthenorth temperate generais the coreof the flora .In the long term effects of re-gional climate environment ,flora show the typicalfeatures oftemperate zone ,and thereareno China endemism genera .