The goal of this study was to evaluate the potential of the marsh fern and the asparagus fern for use in phytoremediation of arsenic-contaminated soils. Specifically, the objectives of this study were to (1) determine whether arsenic accumulation occurred in the selected plants when they were exposed to 250 ppb and 500 ppb, respectively, in hydroponic solution, and (2) to identify the oxidation state of arsenic in plants that accumulated arsenic. Analyses were performed using ICP-MS and XANES. Greenhouse study results indicate that the marsh fern and the asparagus fern both uptake arsenic; their bioaccumulation factors (arsenic concentration in aboveground biomass/arsenic concentration in solution) were greater than 1. The bioaccumulation factor of marsh fern was found to be in the range of known hyperaccumulators such as the brake fern, whereas the bioaccumulation factor for the asparagus fern was determined to be only slightly greater than 1. As (V) and/or As (0) were the dominant species in above-ground biomass of asparagus fern. As (V) was the dominant species in the roots of marsh fern. In conclusion, marsh fern and asparagus fern have the ability to accumulate arsenic into above-ground parts. Marsh fern is a good candidate for phytoextraction of arsenic from soil with low-level contamination. Although asparagus fern is not a good candidate for phytoextraction, its potential for use in phytostabilization of arsenic-contaminated soil should be further investigated.