The examination of spores belonging to eight species representing five genera of Polypodiaceae reveals that they are typically free, anisopolar and monolete (bilateral). In a majority of cases the spores are yellow and have a short laesura—about half the length of the greater equatorial axis of the spore. Generally, the spores are elliptical in polar view and plano-convex to concavo-convex in profile view but in cross section they vary in shape. The average measurements in equatorial plane range from 44 μ to 71 μ whereas in the polar direction they vary from 27 μ to 47 μ. The exine is thin (about 2.5 μ and nearly smooth (laevigose-scabrous-foveolose) inMicrosoriumandPhymatodesbut in the other investigated genera, it is thicker, possessing different types of projections. P: E varies from 4.6 to 5.5: 8. Oil globules are present in the spores of some species.