The percentage of families with single genus and genera with single species is considerably large , and the rate of endemic species to china is 6 . 12 % . all these demonstrate the complexion of hepaticae - flora and the ancient character of origin of bryophytes in hebei 河北省苔類區(qū)系中現(xiàn)存的單屬科、單種屬比例較大,多為處于演化終極的只有少數(shù)殘遺種的科屬,這反映了本省苔類植物區(qū)系起源的古老性。
The studying method of flora adopted by this thesis are follows : the statistics of the dominant families and genera , along with single families and genera , abundance index ( ai ) , similarity coefficient of genus ( scg ) , floristic spectrum analysis ( fsa ) , principal components analysis ( pca ) , as well as agglomerative classification analysis ( aca ) 16 ;單種屬占總屬數(shù)的39 39 ,其種數(shù)僅占總種數(shù)的門26 ;而6個優(yōu)勢科中所含的種數(shù)占到總種數(shù)的903 , 9個優(yōu)勢屬中所含的種數(shù)占總種數(shù)的47