Culms 60-150 cm, (1) 2-3.5 mm thick at the nodes, unbranched, leafy for 40% of their height. Sheaths pilose; collars pilose; ligules 0.2-0.3 mm, entire; blades (15) 20-50 cm long, 4.5-9.5 (15) mm wide, linear-lanceolate, sparsely pilose adaxially. Panicles (9) 20-70 cm, contracted or open, erect; branches tightly appressed or ascending to strongly divergent; axils of panicle branches glabrous or scabridulous at the edges; pedicels 0.3-2.5 (5) mm. Spikelets 4-10 mm long, 6-9 mm wide, with 4-7 (8) florets, lower 1 (2) florets sterile, fertile florets divergent to 80°. Lower glumes 1.2-2.7 mm, 3-5-veined; upper glumes 1.4-2.2 mm, 3-5-veined; calluses glabrous; fertile lemmas 3.5-5.9 mm, usually curved or irregularly contorted, 7-9-veined, keels not winged, apices scabridulous; paleas 2.8-4 mm; anthers (0.8) 1.3-1.6 mm, varying in length within a spikelet. Caryopses 2-2.5 mm, exposed at maturity. 2n = 24.
Va., Okla., Miss., Tex., La., Mo., Ala., Tenn., N.C., S.C., Ark., Ga., Fla.
Chasmanthium sessiliflorum grows in rich woods, meadows, and swamps, especially on the coastal plain. It grows throughout most of the southeastern United States.
"varying" is not a number."leafy" is not a number."decumbent" is not a number.