Andropogon glomeratus |
Andropogon gyrans |
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bushy beardgrass, bushy bluestem |
Elliott's bluestem |
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Habit | Plants cespitose, upper portion dense, oblong to oblanceolate or obpyramidal. | Plants cespitose, cylindrical to ovate above. | ||||||||||||||||||||
Culms | 20-250 cm; internodes green, sometimes glaucous; branches mostly erect, straight. |
30-100 (140) cm; internodes usually glaucous; branches mostly erect, straight. |
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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. |
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. |
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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. |
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. |
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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)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. |
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Pedicellate | spikelets vestigial or absent, sterile. |
spikelets vestigial or absent. |
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2n | = 20. |
= 20. |
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Andropogon glomeratus |
Andropogon gyrans |
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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
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AL; AR; DC; DE; FL; GA; IL; IN; KY; LA; MD; MO; MS; NC; NJ; OH; OK; PA; SC; TN; TX; VA; WV
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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 gyrans extends from the southeastern United States to the Caribbean and Central America. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 25, p. 661. | FNA vol. 25, p. 657. | ||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Andropogoneae > Andropogon > sect. Leptopogon | Poaceae > subfam. Panicoideae > tribe Andropogoneae > Andropogon > sect. Leptopogon | ||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||
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Synonyms | A. subtenuis, A. elliottii var. projectus, A. elliottii | |||||||||||||||||||||
Name authority | (Walter) Britton, Sterns & Poggenb. | Ashe | ||||||||||||||||||||
Web links |