Perennial, clump-forming wetland sedge with narrow, grass-like leaves and distinctive, dense, spike-like seed heads that mature to a brown color, resembling a fox's tail, hence its name; it thrives in moist to wet soil conditions and is often found in areas like marshes, wet meadows, and along waterways, making it a great choice for rain gardens; this plant is considered deer resistant and attractive to birds due to its seeds.