In addition to supporting ecological functions, designs reflective and respectful of place can serve as vestiges in novel landscapes. Charged with redeveloping the landscape at Waterfront Square along the Delaware River in Philadelphia, plant species were selected based on their prospect of having been part of the historical riverine and estuarine plant communities of the region but more importantly, their ability to tolerate and even proliferate in conditions typical of urban environments.
Massing of cool and warm season grasses along with forbs such as Amsonia hubrichtii provides self-sustaining visual interest throughout the year while Morella, Sporobolus, and other woody, grass, and forb species able to withstand desiccating winds and shallow soils help create outdoor rooftop spaces.
