Stipa barbata, with its platinum ostrich-feather awns it really was looking its very best, in full flower it’s the showiest grass of all. Beyond its beauty, the way Stipa barbata self seeds is one of nature’s most fascinating achievements. Each seed that’s dispersed has a long sharp point connected to a fine feather. Once the seed lands, the feather coils up like a corkscrew which unravels in damp weather. This movement gradually drills the seed into the soil.