Andropogon glomeratus |
Andropogon glomeratus var. glaucopsis |
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bushy beardgrass, bushy bluestem |
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Habit | Plants cespitose, upper portion dense, oblong to oblanceolate or obpyramidal. | Plants usually oblong in the upper portion, sometimes cylindrical. | ||||||||||||||||
Culms | 20-250 cm; internodes green, sometimes glaucous; branches mostly erect, straight. |
1.2-2.2 m; internodes glaucous. |
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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. |
(1.3)2.3-3.1(4.7) mm wide, usually smooth; ligules ciliate or not, cilia to 0.2 mm; blades glaucous, glabrous, smooth. |
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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. |
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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. |
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Pedicellate | spikelets vestigial or absent, sterile. |
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Subtending | sheaths of inflorescence units usually 2-2.5 mm wide; peduncles shorter than 10 mm; rames usually shorter than 2 cm, not exerted at maturity. |
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Keels | of lower glumes usually scabrous beyond midlength. |
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2n | = 20. |
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Andropogon glomeratus |
Andropogon glomeratus var. glaucopsis |
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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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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 glomeratus var. glaucopsis grows in flatwoods, bogs, ditches, swamps, pond margins, and swales of the southeastern coastal plain. (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. 664. | ||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Andropogoneae > Andropogon > sect. Leptopogon | Poaceae > subfam. Panicoideae > tribe Andropogoneae > Andropogon > sect. Leptopogon > Andropogon glomeratus | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Synonyms | A. virginicus var. glaucopsis, A. macrourus var. glaucopsis, A. glaucopsis | |||||||||||||||||
Name authority | (Walter) Britton, Sterns & Poggenb. | (Elliott) C. Mohr | ||||||||||||||||
Web links |