Carex rostrata, bottle sedge or beaked sedge, is a perennial species of sedge in the family Cyperaceae.
Carex pseudocyperus is a species of flowering plant in the sedge family known by the common name cyperus sedge or hop sedge. It grows in marshes, swamps, and the margins of ponds, rivers and canals. The stems can be up to 90 centimetres (35 in) with one male spike and 3–-5 pendulous female spikes, and bright yellow-green leaves to 1.2 metres (3 ft 11 in).
Carex vesicaria is an essentially Holarctic species of sedge known by the common names bladder-sedge, blister sedge. The dried fibers, sometimes used as thermal insulation in polar regions, are known as sennegrass, saennegrass or similar, from the plant's Bokmål name sennegras.