Rhynchospora capitellata is a species of sedge known by the common names brownish beaksedge[1] and brownish beaked-rush.

It is native to eastern North America and a few spots in the western United States.

It grows in wet habitat, such as swamps, springtime meadows, and moist areas in forests.

It is a perennial herb producing clumps of stems 20 to 100 centimeters tall, each stem sheathed with several narrow, pointed leaves.

The inflorescence is a cluster of brown spikelets each about 3 or 4 millimeters long.