July - September
0.6 - 1.3
A rhizomous perennial, 7-13 dm tall, with culms 2-4 mm thick at the base and willowy at the top.
Frequent in moist sandy soils throughout Louisiana and near the coast in east Texas. Rhynchospora caduca is sometimes infected with ergot (Claviceps purpurea).
Moist sand, marshes, wet soil, ditches, savannahs, and low woods.