Andropogon glomeratus |
Andropogon glomeratus var. pumilus |
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bushy beardgrass, bushy bluestem |
bushy bluestem |
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Habit | Plants cespitose, upper portion dense, oblong to oblanceolate or obpyramidal. | Plants oblanceolate to obpyramidal in the upper portion. | ||||||||||||||||
Culms | 20-250 cm; internodes green, sometimes glaucous; branches mostly erect, straight. |
to 2.5 m, but as short as 20 cm in poor soils; internodes not 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. |
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Leaf | sheaths usually smooth; ligules ciliate, cilia 0.2-0.9 mm; blades green, smooth or pubescent. |
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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 (2)2.9-4.3(5.2) cm long, 1.5-3 mm wide; peduncles (2)8-15(40) mm; rames 1.3-3 cm, exerted. |
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Keels | of lower glumes usually smooth below midlength, scabrous distally; anthers often retained within the spikelets. |
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2n | = 20. |
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Andropogon glomeratus |
Andropogon glomeratus var. pumilus |
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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; AZ; CA; FL; GA; LA; MS; NC; NM; NV; OK; SC; TX; UT; VA; 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. pumilus is weedy and grows in disturbed, wet or moist sites. It is abundant and widespread, extending from the southern United States through Central America to northern South 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. 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. tenuispatheus, A. virginicus forma tenuispatheus | |||||||||||||||||
Name authority | (Walter) Britton, Sterns & Poggenb. | (Vasey) L.H. Dewey | ||||||||||||||||
Web links |