![tranny](http://www.catharinehoward.co.uk/wp-content/uploads/2013/08/tranny1-225x300.jpg)
Transparency is a major quality in a perennial. There are plants that are of a certain stature, take the movement of the breeze and are see-through. They do not need staking and create allure and atmosphere. The tall grass
Stipa gigantea is in that league.