This study was aimed to evaluate Sedums (Sedum mexicanum Britt., Sedum sarmentosum Bge. and Sedum pallidum var.bithynicum) and turf grass (Zoysia matrella Merr.) as a phytoremediator which removing NO2 in the small chamber scale. In addition, we considered that there is a relation between ability of NO2 removal and other factors which are pubescence, stomatal density (n/mm2) and guard cell length (μm). As a result, when 60min passed, amount of NO2 removal of sedums was 151.2 ~ 306.5μg/m2, while those of turf grass was 79.1μg/m2. But after that, there was not much difference between them and they completely removed NO2. It became clear that sedums had ability of NO2 removal which was equivalent to turf grass or higher than it. Furthermore, ability of NO2 removal was some relations to form of pubescence. But it seems that there were few relations between ability of NO2 removal and other factors such as stomatal density (n/mm2) and guard cell length (μm).
