The structure and dynamics of the leading-edge vortex (LEV) were investigated for plunging finite-aspect-ratio wings at a chord Reynolds number of 10,000 while varying aspect ratio and root boundary condition. Stereoscopic particle image velocimetry (SPIV) measurements were used to characterize LEV dynamics and interactions with the plate in multiple chordwise planes. The relationship between the vorticity field and the spanwise flow field over the wing, and the influence of root boundary conditions on these quantities has been investigated. The viscous symmetry plane was found to influence this flow field, in comparison to other studies,1-3 by influencing tilting of the LEV near the symmetry wall, and introducing a corewise root-to-tip flow near the symmetry plane. Modifications in the root boundary conditions were found to significantly affect this. LEV circulations for the different aspect ratio plates were also compared. At the bottom of the downstroke, the maximum circulation was found at the middle of the semi-span in each case. The circulation of the sAR = 2 wing was found to significantly exceed that of the sAR = 1 wing and, surprisingly, the maximum circulation value was found to be independent of root boundary conditions for the sAR = 2 case and also closely matched that of the quasi-2D case.