Andropogon gyrans

Ashe
Synonyms: Andropogon subtenuis Andropogon elliottii var. projectus Andropogon elliottii
Treatment appears in FNA Volume 25. Treatment on page 657.

Plants cespitose, cylindrical to ovate above. Culms 30-100 (140) cm; internodes usually glaucous; branches mostly erect, straight. Sheaths smooth; ligules 0.3-1.5 mm, sometimes ciliate, cilia to 0.7 mm; blades 6-48 cm long, 0.8-5 mm wide, glabrous or densely pubescent with spreading hairs. Inflorescence units 2-31 per culm; subtending sheaths (2.6) 4.1-4.5 (13.5) cm long, (1.5) 2.7-4.7 (8) mm wide; peduncles (1) 5-31 (195) mm, with 2-5 rames; rames (1.5) 2.8-4.2 (6) cm, exserted or not at maturity, pubescence increasing in density distally within each internode. Sessile spikelets (3) 3.9-4.7 (5.7) mm; callus hairs 1-5 mm; keels of lower glumes scabrous only beyond midlength; awns 8-24 mm; anthers 1, 0.6-1.4 (1.7) mm, yellow or purple. Pedicellate spikelets vestigial or absent. 2n = 20.

Distribution

Del., D.C., W.Va., Fla., N.J., Tex., La., Tenn., N.C., S.C., Pa., Va., Ala., Ark., Ill., Ga., Ind., Md., Okla., Ohio, Mo., Miss., Ky.

Discussion

Andropogon gyrans extends from the southeastern United States to the Caribbean and Central America.

Selected References

None.

Key

1 Ligules 0.3-1.1 mm long; rames usually hidden within the more or less overlapping and inflated upper sheaths at maturity; plants usually of well-drained soils Andropogon gyrans var. gyrans
1 Ligules 0.8-1.5 mm long; rames usually exposed at maturity; plants of wet habitats Andropogon gyrans var. stenophyllus

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

... more about "Andropogon gyrans"
1.7 cm17 mm <br />0.017 m <br /> (?) +
purple +  and yellow +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
anatomy +  and kranz +
Christopher S. Campbell +
1 (?) +  and 3 (?) +
0.8 cm8 mm <br />0.008 m <br /> (2.4 cm24 mm <br />0.024 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 +
6 cm60 mm <br />0.06 m <br /> (48 cm480 mm <br />0.48 m <br />) +
pubescent +  and glabrous +
convolute +, folded +, flat +  and linear +
reduced +
0.8mm;5mm +
spikelike +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0 cm0 mm <br />0 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
much-branched +
purple +  and reddish +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not woody +
Del. +, D.C. +, W.Va. +, Fla. +, N.J. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Va. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Md. +, Okla. +, Ohio +, Mo. +, Miss. +  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 +
4.1 cm41 mm <br />0.041 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
with inconspicuous veins +  and veined +
fimbriate +  and cupulate +
solid +  and hollow +
photosynthetic +
not aromatic +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 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 /> (?) +
1.5 cm15 mm <br />0.015 m <br /> (?) +  and 1 cm10 mm <br />0.01 m <br /> (?) +
2.8 cm28 mm <br />0.028 m <br /> (?) +  and 4.2 cm42 mm <br />0.042 m <br /> (?) +
dry +  and fleshy +
elongate +
pedicellate +  and sessile +
in triplets +  and paired +
well-developed +
usually smaller +  and reduced +
0.39 cm3.9 mm <br />0.0039 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Andropogon subtenuis +, Andropogon elliottii var. projectus +  and Andropogon elliottii +
Andropogon gyrans +
Andropogon sect. Leptopogon +
species +
membranous +
sessile-pedicellate +
inconspicuous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +
cylindrical +  and ovate +