Plants usually oblong in the upper portion, sometimes cylindrical. Culms
1.2-2.2 m; internodes glaucous. Sheaths (1.3)2.3-3.1(4.7) mm wide,
usually smooth; ligules ciliate or not, cilia to 0.2 mm; blades
glaucous, glabrous, smooth. Subtending sheaths of inflorescence units usually
2-2.5 mm wide; peduncles shorter than 10 mm; rames usually shorter
than 2 cm, not exserted at maturity. Keels of lower glumes usually scabrous
Andropogon glomeratus var. glaucopsis grows in flatwoods, bogs,
ditches, swamps, pond margins, and swales of the southeastern coastal plain.
Lvs usually 3.5 dm or more; stem-sheaths usually scabrous; infl compact, obconic or corymbiform, densely glomerately branched, the internodes greatly shortened; uppermost nodes mostly villous; fertile spikelets avg 4.2 mm; sterile spikelet commonly present; wet soil; W.I. and C. Amer., n. to Calif., Ark., Ky., Va., and along the coastal plain to Mass. (A. glomeratus)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.