Combined mulching and shredding blade

The invention relates to rotary lawn mower blades. A rotary lawn mower blade with improved combined mulching and shredding capability includes an outboard section having a leading cutting edge and a trailing edge. The trailing edge of the outboard section includes a plurality of teeth. The blade also includes a transition section having a leading cutting edge that is at least partially offset relative to the leading cutting edge of the outboard section. The transition section further includes a trailing edge having a partial tooth. Preferably, the plurality of teeth on the outboard section are twisted in either an inboard or an outboard direction. Additionally, the partial tooth can be twisted in an inboard direction. The blade also preferably includes a central mounting portion and an inboard section between the central mounting portion and the transition section. The inboard section also includes a leading cutting edge and a trailing edge.