Abstract: An elongated front to rear extending ramp or wedge member is pivotally supported from the lower marginal edge portion of one side of a downwardly opening rotary lawn mower housing and angularly displaceable about an axis extending transversely of the housing and the wedge member between an operative forwardly and downwardly inclined position and a raised horizontal position. The wedge member, when in the forwardly and downwardly inclined operative position and moving along a marginal edge of the lawn area being cut, is operative to slide beneath and upwardly straightened blades of grass lying over a curb, walk, or driveway bordering the aforementioned marginal edge so that the raised blades of grass may be cut by the blade of the rotary mower. A Bowden cable is operatively connected between the wedge member and the rotary mower housing and may be remotely operated to swing the wedge member between the raised inoperative position and the lowered operative position.