Abstract: This study was carried out to assess how the presence of Vernonia cinerea (Linn.) Less. impacts on plant biodiversity wherever it occurs, and to determine the species diversity in the plots where V. cinerea was present and those in which the plant was absent. Abundance measures of V. cinerea and other associated species in its natural environment and species diversity (using Shannon-Wiener Index) were determined using the quadrat method. Four different plots were chosen for the study: two plots were chosen from sites where V. cinerea was present and the other two plots were chosen from sites where V. cinerea was absent. Results from the species abundance of V. cinerea and other associated species in plots where V. cinerea was present showed that V. cinerea had low density, frequency and importance value; implying that, V. cinerea had very low species abundance. While the observations from the diversity of species showed that although, the plots where V. cinerea was present and absent had high species diversity, plots where V. cinerea was present had a higher number of species and these species were more evenly distributed. It is concluded from the results that the presence of V. cinerea did not have any observable impact on the plant biodiversity in areas where it occurred and V. cinerea is, therefore, not an invasive species.