Dulichium arundinaceum 
Three way sedge

Dulichium arundinaceum
Dulichium arundinaceum
Photo courtesy Renee Brecht
Britton & Brown
Botanical name: Dulichium arundinaceum (L.) Britton
Common name: Three way sedge
Group: monocot
Family: Cyperaceae
Growth type: graminoid
Duration: perennial
Origin: native
Plant height: 30 cm-1 meter
Foliage: Leaves are perfectly three ranked; alternate, simple linear stems are hollow
Flower: one per scale, many scales per spikelet, each spikelet pointed at the tip
Flowering time: mid June to late September
Habitat: swamps and marshes
Range in New Jersey: statewide, decreasing on the coast strip and up tidewater streams
Heritage ranking, if any: n/a
Misc. Dulichium, Latin, "an island of the Ionian Sea, southeast of Ithaca, belonging to the kingdom of Ulysses"; arundinaceum,  Latin, arundo, "reed, cane", and  aceus, "resembles,.like"; i.e, reed-like.