When talking about lawn, the first thought that would come to mind is the type of grass that was laid on it. The common name will include centipede, zoysia, bemuda, and cow grass. But, what about the lesser known name that would invade the lawn with homogeneous type of grass as earlier mentioned. We certainly would call them "weed" and we will find ways to remove them.
But, if these mix of lesser known grass are frequently maintain, it can also form a beautiful lawn.
The picture below is the backyard of my next door neighbor property. It has been vacant for more than ten years. The property owner stays at other place and use this house as a remote storage space.