Coelorachis tuberculosa (Nash) Nash

Natural range:  Florida

Habitat: Wet places, shores, marshy sites

Recognition:  Similar to C. rugosa, but the sessile spikelet bumpy (but not with strongly developed transverse bars) or smooth.   The pedicel is straight (vs. slightly bent), and flowering tends to be later in the season.

Florida status: Rare, listed by FL FWC as Threatened