Abstract: A grass cutter and mulcher for a rotary lawn mower. A flat disc is mounted to the output drive shaft of a rotary lawn mower. A plurality of flexible rods are cantileveredly mounted to the disc and extend outwardly therefrom to cut grass as the disc is rotated by the mower. The rods are arranged in a nonradial direction and extend in an advancing manner preceding the direction of disc rotation to provide a slicing cut force upon the grass and an inwardly directed force upon the cut grass to limit the outward movement of the grass. A plurality of slots in the disc are aligned with the rods allowing insertion and removal of the rods.