Look for coarse blades somewhat upright in a bunch-type growth. Rhizomes are so closely jointed that they appear almost scaly.
Stems 2 to 6 inches long emerge from the plant center in a star like pattern. Seed heads are sparsely branched on long stems. Seeds lie dormant over the winter and sprout very early in spring.
This is a summer weed in many areas of the country, but it grows throughout the year in mild climates, and thrives in those areas that are low and wet.