Dwarf Papyrus is a good choice for edges of ponds or bogs 

Dwarf Papyrus, also know as Cyperus Haspans. Keep in wet soil. Keep roots underwater about 1-4". Max height is approximately 24". Greenish-Brown flower clusters.

Sold As: 3.5" Pot (Approx 24" Tall)

Care Level: Easy

Lighting Requirement: Full Sun 

Co2: Not Needed

Growth Rate: Moderate

Origin: Africa