Difference between revisions of "Andropogon gyrans"
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Revision as of 21:03, 5 November 2020
Plants cespitose, cylindrical to ovate above. Culms 30-100 (140) cm; internodes usually glaucous; branches mostly erect, straight. Sheaths 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. Inflorescence units 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. Sessile 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. Pedicellate spikelets vestigial or absent. 2n = 20.
Distribution
Del., D.C., W.Va., Fla., N.J., Tex., La., Tenn., N.C., S.C., Pa., Va., Ala., Ark., Ill., Ga., Ind., Md., Okla., Ohio, Mo., Miss., Ky.
Discussion
Andropogon gyrans extends from the southeastern United States to the Caribbean and Central America.
Selected References
None.
Key
| 1 | Ligules 0.3-1.1 mm long; rames usually hidden within the more or less overlapping and inflated upper sheaths at maturity; plants usually of well-drained soils | Andropogon gyrans var. gyrans |
| 1 | Ligules 0.8-1.5 mm long; rames usually exposed at maturity; plants of wet habitats | Andropogon gyrans var. stenophyllus |