One of our most popular bog plants is the Dwarf Papyrus. I think its an unusual looking plant and adds alot of dimension to the pond. It always seems to grow well and is one pond plant that is easy to grow and attend to. The Dwarf Papyrus is a good bog plant to create a tub garden or tabletop pond. I have one growing in a ceramic pot on my patio and it does well.
The papyrus grows in sun to part shade and likes moist soil and can tolerate water up to 4 inches deep. Its considered hardy Zones 8-11 but can easily be wintered over indoors. As long as you keep the plant in 50 degrees and above it will be fine. You may watch for mealybugs as they will sometimes appear on the plant during the winter but can easily be treated.
They grow 12-18 inches high with a spread of 6-12 inches. To start other plants take the seeds and put in wet soil or propagate from the viviparous top fronds. You'll soon have other plants to place in your pond.
If you like larger plants you can go for the Dwarf Giant Papyrus (Cyperus percamenthus) which will grow about 3 feet high. There is also the Egyptian Papyrus (Cyperus papyrus) which can grow to 8 feet high.
Whichever Papyrus you chose it is a unique pond plant for your pond.