Andropogon gyrans
Elliott's bluestem
30-100 (140) cm;
internodes usually glaucous;
branches mostly erect, straight.
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.
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.
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.
spikelets vestigial or absent.
= 20.
Andropogon gyrans
Andropogon gyrans extends from the southeastern United States to the Caribbean and Central America.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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 | var. gyrans |
1. Ligules 0.8-1.5 mm long; rames usually exposed at maturity; plants of wet habitats | var. stenophyllus |
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