Plants cespitose. Culms 80-120 cm, compressed-keeled. Sheaths compressed-keeled;
blades to 41 cm long, to 7.8 mm wide, folded to flat, scabrous above. Rames
4.5-7(12) cm. Sessile spikelets 3.9-6.2 mm long, 2.1-2.4 mm wide; lower
glumes with rectangular pits, keels narrowly winged distally. Pedicellate
spikelets 2.3-2.7 mm, reduced to scales. 2n = unknown.
Coelorachis tessellata is endemic to the southern coastal plain of the
United States, extending from Louisiana to northern Florida, although it is rare
in Florida. It grows in bogs and moist pine woods, especially flatwoods.