东北地区湿地野生种子植物区系

据统计,东北地区湿地野生种子植物已知有693种、42变种、12变型,隶属于72科、257属,以草本植物为主。含物种比较丰富的科有莎草科、菊科、禾本科、蓼科、毛茛科及玄参科,含种数比较多的属包括薹草属(Carex)、蓼属(Polygonum)、柳属(Salix)、毛茛属(Ranunculus)、藨草属(Scirpus)、眼子菜属(Potamogeton)等。该区湿地种子植物种的地理成分包含24个分布区类型和25个亚型,以温带性质成分为主体,并包含了少量的热带性质成分。与其他地区相比,东北湿地种子植物含有寒带性质成分128种,占18.47%。地理联系广泛,尤其与西伯利亚和北极植物区系联系最密切。

Flora components of wetland wild seed plants in Northeast China

In the wetlands of Northeast China,there are 693 species,42 varieties,and 12 forms belonging to 257 genera and 72 families.Most of the plants are herbs.The dominant families are Cyperaceae,Compositae,Gramineae,Polygonaceae,Ranunculacea and Scrophulariaceae,and the dominant genera are Carex,Polygonum,Salix,Ranunculus,Scirpus,and Potamogeton.Geographically,the wild plant species include 24 types and 25 subtypes,most of which embody the feature of temperate zone,and some have the feature of tropical zone.Compared with those in other areas,the wild plants in the wetlands of Northeast China have 128 species with the feature of cold zone,accounting for 18.47%.The wild seed plant flora in this region geographically correlates well with that in other regions,especially in the Siberia and the Arctic.