Plants cespitose, upper portion dense, oblong to oblanceolate or obpyramidal. Culms 20-250 cm; internodes green, sometimes glaucous; branches mostly erect, straight. Sheaths usually scabrous, sometimes smooth; ligules 0.6-2.2 mm, sometimes ciliate, cilia to 0.9 mm; blades 13-109 cm long, 2.9-9.5 mm wide, glabrous or sparsely to densely pubescent, hairs usually spreading, rarely appressed. Inflorescence units 10-600 per culm; subtending sheaths (2.0) 2.9-4.4 (6.5) cm long, (1.5) 2.3-3.4 (4.4) mm wide; peduncles (1) 6-14 (60) mm, with 2 (4) rames; rames (1) 1.7-2.5 (3.5) cm, exserted or not at maturity, pubescence sparse basally and increasing in density distally within each internode. Sessile spikelets 3-5 mm; callus hairs 1-2.5 mm; keels of lower glumes sometimes scabrous below midlength, usually scabrous distally; awns 6-19 mm; anthers 1 (3), 0.5-1.5 mm, yellow, red, or purple. Pedicellate spikelets vestigial or absent, sterile. 2n = 20.

Distribution

Del., D.C., W.Va., Pacific Islands (Hawaii), N.C., N.Y., R.I., S.C., Utah, Fla., Okla., Tex., N.J., Ark., Ariz., Calif., Ga., La., Md., Miss., N.Mex., Nev., Puerto Rico, Va., Virgin Islands, Tenn., Pa., Ala., Ill., Mass., Ohio, Ky.

Discussion

Andropogon glomeratus hybridizes with both A. longiberbis and A. virginicus. Some of its varieties are morphologically similar to the latter species.

Selected References

None.

Key

1 Blades glaucous, glabrous, and smooth Andropogon glomeratus var. glaucopsis
1 Blades green, often pubescent or scabrous > 2
2 Sheaths subtending the inflorescence units 1.5-3 mm wide; leaf sheaths usually smooth; ligules ciliate, the cilia 0.2-0.9 mm long Andropogon glomeratus var. pumilus
2 Sheaths subtending the inflorescence units (1.5)2.3-3.4(4.4) mm wide; leaf sheaths often scabrous; ligules, when ciliate, with the cilia no more than 0.5 mm long. > 3
3 Keels of the lower glumes scabrous below and beyond midlength Andropogon glomeratus var. scabriglumis
3 Keels of the lower glumes usually smooth below midlength, scabrous distally. > 4
4 Upper portion of the plants oblong to obpyramidal; mature peduncles (4)11-35(60) mm long; anthers eventually falling Andropogon glomeratus var. glomeratus
4 Upper portion of the plants cylindrical to oblong; mature peduncles 2-5 (8) mm long; withered remnants of anthers retained within the spikelets Andropogon glomeratus var. hirsutior

"decumbent" is not a number."elongated" is not a number.

... more about "Andropogon glomeratus"
purple +, red +  and yellow +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
anatomy +  and kranz +
Christopher S. Campbell +
(Walter) Britton, Sterns & Poggenb. +
1 (?) +  and 3 (?) +
0.6 cm6 mm <br />0.006 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
terete +  and flattened +
slender +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
pseudopetiolate +
non-radiate +  and radiate +
well-developed +
13 cm130 mm <br />0.13 m <br /> (109 cm1,090 mm <br />1.09 m <br />) +
glabrous or +  and sparsely densely pubescent +
convolute +, folded +, flat +  and linear +
reduced +
2.9mm;9.5mm +
spikelike +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0 cm0 mm <br />0 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Bushy bluestem +  and Bushy beardgrass +
much-branched +
purple +  and reddish +
20 cm200 mm <br />0.2 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
not woody +
Del. +, D.C. +, W.Va. +, Pacific Islands (Hawaii) +, N.C. +, N.Y. +, R.I. +, S.C. +, Utah +, Fla. +, Okla. +, Tex. +, N.J. +, Ark. +, Ariz. +, Calif. +, Ga. +, La. +, Md. +, Miss. +, N.Mex. +, Nev. +, Puerto Rico +, Va. +, Virgin Islands +, Tenn. +, Pa. +, Ala. +, Ill. +, Mass. +, Ohio +  and Ky. +
capillary +
sometimes longer +
concealing +
compressed +  and terete +
shorter or longer +
subtending +
compressed +  and rounded +
unequal +
uncinate +
bracteate +  and ebracteate +
pedunculate +  and multiple-stalked +
2.9 cm29 mm <br />0.029 m <br /> (4.4 cm44 mm <br />0.044 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
with inconspicuous veins +  and veined +
fimbriate +  and cupulate +
solid +  and hollow +
photosynthetic +
not aromatic +
coriaceous +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
membranous +
inconspicuous +
2-9-veined +  and veined +
concave +, flat +  and 2-keeled +
complex +  and simple +
concealed +  and prominent +
sessile-pedicellate +
heterogamous +
not fused +
3 cm30 mm <br />0.03 m <br /> (?) +
1 cm10 mm <br />0.01 m <br /> (?) +
1.7 cm17 mm <br />0.017 m <br /> (?) +  and 2.5 cm25 mm <br />0.025 m <br /> (?) +
dry +  and fleshy +
elongate +
pedicellate +  and sessile +
in triplets +  and paired +
well-developed +
usually smaller +  and reduced +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Gramineae +
Andropogon glomeratus +
Andropogon sect. Leptopogon +
species +
membranous +
sessile-pedicellate +
inconspicuous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +