Flora of North America species comparison

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Andropogon longiberbis

hairy bluestem
Habit 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.

Andropogon longiberbis
Distribution
from FNA
FL; GA; MS; NC; SC
[WildflowerSearch map]
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 25, p. 661.
Parent taxa Poaceae > subfam. Panicoideae > tribe Andropogoneae > Andropogon > sect. Leptopogon
Sibling taxa
A. arctatus, A. bicornis, A. brachystachyus, A. floridanus, A. gerardii, A. glomeratus, A. gracilis, A. gyrans, A. hallii, A. liebmannii, A. ternarius, A. tracyi, A. virginicus
Name authority Hack.
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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