2" Potted Plant. Cyperus haspan, also known as dwarf papyrus, has been a mainstay in the water garden industry. This tropical marginal plant resembles a miniature version of the giant papyrus. A vigorous grower and easy to maintain, dwarf papyrus is a great plant to add a tropical look to your water feature no matter what the size. You can plant it singly or in a group around the margins of your pond.