鬼针草的统计分类研究

Taximetrics study of varieties of Bidens pilosa species

  Hooker (1882) has reported three varieties in Bidens pilosa species i. e., pilosa     Proper, Linn. bipinnata Linn. and decomposita Wall. Clarke  (1876) has included     var. decomposita into B. pilosa proper. Taxonomic position of varieties pilosa proper     and bipinnata is much confusing in literature. Babu (1977)has raised varieties pilosa     proper and bipinnata as distinct species level into B.  pilosa and  B.  bipinnata     respectively. The present taximetric study also justified the distinction of these varieties     as specific level.     Hooker has reported three varieties of species B. pilosa i.e., pilosa proper Linn.,bipinnata Linn., and decomposita Wall. from the Himalayan region of India.  Clarke(1876) has included var. decomposita into B. pilosa proper. During taxonomic work onthe family Compositae author has found that taxonomic position of var. pilosa properand bipinnata is much confusing in literature. Babu (1977) has raised varieties pilosaproper and bipinnata as distinct species level.  Looking to this discretion, it was de-eided to use taximetrics in interpreting taxonomic status of these taxa.