Torrey's Rush (Juncus torreyi)

http://www.missouriplants.com/GSR/Juncus_torreyi_page.html

Torrey's Rush is a perennial rush growing widespread from southern Canada to northern Mexico and from the east to west coast. Torrey's rush is found in wetlands such as wet prairies, sedge meadows, ditches, along ponds and lakes. Torrey's rush like most rushes are grass-like, but are not true grasses. Rushes are in the Juncaceae family and grasses are in the Poaceae family. Torrey's rush is characterized by its round spiky seed heads that are closely held together. The plant itself is a maximum of 3-5 feet.