鲁中山区植物区系初步研究

Preliminary Studies on the Flora in Luzhong Mountains

鲁中山区位于山东省中部,该区植物种类丰富,有维管植物15 1科,64 4属,14 0 2种;地理成分复杂,区系类型多样,现有15个分布型及2 2个变型。区系组成的大科及主要科共18科,如禾本科,菊科,蔷薇科,豆科等,共有植物3 3 7属,80 3种,占鲁中山区种子植物总属数的5 4.62 % ,总种数的60 .2 4% ,它们构成了鲁中山区植物区系的基本框架。植物区系具有以下特征:(1)属的地理分布类型多样,温带成分优势明显;(2 )外来植物数量较多,木本植物比例较大,且多为人工引种;(3 )珍稀濒危植物种类丰富;(4 )本区特有植物2 4种,相对全省来讲,区系的特有程度较高。

Luzhong mountains are located in the central of Shandong province and have abundant plant diversities,including 1402 species which belong to 151 families and 644 genera.The flora is complex in geographical elements,divided 15 types and 22 subtypes.Several large families are Gramineae,Compositae,Rosaceae,Leguminose etc,including 337genera and 803 species,about 54.62%of the total genera and 60.24%of the total species.The major characters of the flora are as follows:(1)The geographic distribution types of genera are diversiform,and the superiority of temperate zone components is distinct.(2)There are a number of exoticspecies.great proportion of them are wood and much of them cited by man.(3)The kind of rare and threatened plants are abundance.(4)There are 24 kinds of own plants,comparing to the whole province,it has a higher degree.