Andropogon glomeratus |
Andropogon longiberbis |
|||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
bushy beardgrass, bushy bluestem |
hairy bluestem |
|||||||||||||||||
Habit | Plants cespitose, upper portion dense, oblong to oblanceolate or obpyramidal. | Plants cespitose; cylindrical to oblong and more or less open in the upper portion. | ||||||||||||||||
Culms | 20-250 cm; internodes green, sometimes glaucous; branches mostly erect, straight. |
50-100(150) cm; internodes green, sometimes somewhat glaucous just below the node; 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. |
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 | 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. |
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 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. |
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, sterile. |
spikelets vestigial or absent. |
||||||||||||||||
2n | = 20. |
= 20. |
||||||||||||||||
Andropogon glomeratus |
Andropogon longiberbis |
|||||||||||||||||
Distribution |
AL; AR; AZ; CA; DC; DE; FL; GA; IL; KY; LA; MA; MD; MS; NC; NJ; NM; NV; NY; OH; OK; PA; RI; SC; TN; TX; UT; VA; WV; HI; PR; Virgin Islands
|
FL; GA; MS; NC; SC
|
||||||||||||||||
Discussion | Andropogon glomeratus hybridizes with both A. longiberbis and A. virginicus. Some of its varieties are morphologically similar to the latter species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
||||||||||||||||
Key |
|
|||||||||||||||||
Source | FNA vol. 25, p. 661. | FNA vol. 25, p. 661. | ||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Andropogoneae > Andropogon > sect. Leptopogon | Poaceae > subfam. Panicoideae > tribe Andropogoneae > Andropogon > sect. Leptopogon | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Name authority | (Walter) Britton, Sterns & Poggenb. | Hack. | ||||||||||||||||
Web links |