Rhynchospora compressa, known by the common name of flatfruit beaksedge, is a member of the sedge family, Cyperaceae. It is a perennial herb, found in wetlands of the southeastern United States, primarily along the northeastern Gulf Coast.

R. compressa grows approximately 5 ft (1.5 m) tall, and may be found in moist sands or peats near bogs, in savannas, or in pinelands. Its dark brown spikelets bloom from May through November.