Eleocharis elongata Chapman
Distribution: Southern U.S. to South America
Habitats: Varied moist habitats, often growing submerged (then grassy and sometimes branched)
Florida status: Native
Recognition: Culms thin, grassy, flexuous, to 80 cm tall, spongy (see habitat above). Spikelet elongate and narrow, 9-24 mm long. Scales with dark borders. Achene light-colored, with transverse bands, narrowed at the tip to a short bottleneck.