Three Square
Schoenoplectus pungens

Family: Sedge (Cyperaceae)
AKA: Chairmaker's Rush, American Bulrush, Basket Grass, et al
Photo taken on: August 9, 2012
Location: Rio Chama, Abiquiu, NM
Life Zones: Plains to foothills
Habitat: Shallow wet areas, ponds, marshes

Grows to 4 feet tall with a stout triangular stem. Flower spikes are reddish brown and form several inches below the tip of the stem. Leaves are grass-like.

Flora of North America reference.