Andropogon longiberbis

Hack.
Common names: Hairy bluestem
Treatment appears in FNA Volume 25. Treatment on page 661.

Plants cespitose; cylindrical to oblong and more or less open in the upper portion. Culms 50-100 (150) cm; internodes green, sometimes somewhat glaucous just below the node; branches mostly erect, straight. Sheaths not scabrous; ligules 0.2-0.6 mm, ciliate, cilia 0.3-0.6 mm; blades 11-50 cm long, 2-5.5 mm wide, sparsely to densely pubescent, most hairs appressed. Inflorescence units 7-97 (usually about 45) per culm; subtending sheaths (2.5) 3-4.5 (6) cm long, (2.5) 3.2-4.1 (5.5) mm wide; peduncles (1) 3-4 (13) mm, with 2 (3) rames; rames (1.3) 1.8-2.6 (4) cm, not exserted at maturity, pubescence increasing in density distally within each internode. Sessile spikelets (3.5) 4.1-4.5 (5) mm; callus hairs 1.5-5 mm; keels of lower glumes scabrous only above the midpoint; awns 10-21 mm; anthers 1, 0.9-1.6 mm, yellow. Pedicellate spikelets vestigial or absent. 2n = 20.

Distribution

N.C., S.C., Fla., Miss., Ga.

Discussion

Andropogon longiberbis grows in sandy or rocky soils of roadsides, dunes, sandhills, pinelands, and fields, from the southeastern United States to the Bahamas. It resembles A. tracyi, but usually differs in having more densely pubescent blades and a less slender appearance.

Andropogon longiberbis appears to hybridize with both A. virginicus var. virginicus and A. glomeratus var. pumilus.

Selected References

None.

Lower Taxa

None.

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

... more about "Andropogon longiberbis"
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
anatomy +  and kranz +
Christopher S. Campbell +
1 (?) +  and 3 (?) +
1 cm10 mm <br />0.01 m <br /> (2.1 cm21 mm <br />0.021 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 +
11 cm110 mm <br />0.11 m <br /> (50 cm500 mm <br />0.5 m <br />) +
convolute +, folded +, flat +  and linear +
reduced +
2mm;5.5mm +
spikelike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Hairy bluestem +
much-branched +
purple +  and reddish +
50 cm500 mm <br />0.5 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not woody +
N.C. +, S.C. +, Fla. +, Miss. +  and Ga. +
capillary +
sometimes longer +
concealing +
compressed +  and terete +
shorter or longer +
subtending +
compressed +  and rounded +
unequal +
uncinate +
bracteate +  and ebracteate +
pedunculate +  and multiple-stalked +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.41 cm4.1 mm <br />0.0041 m <br />) +
with inconspicuous veins +  and veined +
fimbriate +  and cupulate +
solid +  and hollow +
each +  and glaucous +
photosynthetic +
not aromatic +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 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 /> (?) +
1.3 cm13 mm <br />0.013 m <br /> (?) +  and 1 cm10 mm <br />0.01 m <br /> (?) +
1.8 cm18 mm <br />0.018 m <br /> (?) +  and 2.6 cm26 mm <br />0.026 m <br /> (?) +
dry +  and fleshy +
elongate +
pedicellate +  and sessile +
in triplets +  and paired +
well-developed +
usually smaller +  and reduced +
0.41 cm4.1 mm <br />0.0041 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Gramineae +
Andropogon longiberbis +
Andropogon sect. Leptopogon +
species +
membranous +
sessile-pedicellate +
inconspicuous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +
cylindrical +  and oblong +