Spots of dead grass will often repair themselves eventually. For a quicker fix, cut out the dead spot and fill it in with plugs cut from a strip of sod. Bring a clump from your lawn to the nursery ...
Pili grass is an herbaceous, tropical, bunching or tussock grass that is a perennial here in Hawaii. Mature clumps of erect pili are usually 2 feet or more high and have a 2 to 5 foot spread.