Andropogon liebmannii
Andropogon gyrans
Liebmann's bluestem, Mohr's bluestem
Elliott's bluestem
20-170 cm;
internodes not glaucous;
branches mostly erect, straight.
30-100 (140) cm;
internodes usually glaucous;
branches mostly erect, straight.
smooth;
ligules 0.7-1.2 mm, sometimes ciliate, cilia to 0.4 mm;
blades 3-35 cm long, 2.5-7.5 mm wide, sparsely to densely pubescent with spreading, shaggy hairs.
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.
7-50 per culm; subtending sheaths (4)4.9-7.4(10) cm long, (3)4.2-6.1(10.1) mm wide;
peduncles (10)24-68(130) mm, at least some extending beyond the subtending sheaths at maturity, with 2-13 rames;
rames (2)2.4-4(5) cm, usually exserted at maturity, pubescence 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.
spikelets (3)4-4.5(6.9) mm;
keels of lower glumes scabrous above (and sometimes below) the midpoint;
awns 17-24 mm;
anthers 1, 0.7-1.4 mm, yellow.
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.
spikelets vestigial or absent.
= 20.
= 20.
Andropogon liebmannii
Andropogon gyrans
Andropogon liebmannii has two varieties. Andropogon liebmannii var. pungensis (Ashe) C.S. Campb., the variety found in the Flora region, differs from A. liebmannii Hack. var. liebmannii, which grows in Mexico, in having culms that are usually more than 80 cm tall, leaves that are more than 15 cm long, and sessile spikelets that are more than 4.2 mm long; in var. pungensis the culms are usually less than 90 cm tall, the leaves less than 15 cm long, and the sessile spikelets less than 4.2 mm long.
Andropogon liebmannii var. pungensis grows along the coastal plain of the southeastern United states in bog, swamp, savannahs, and flatwoods. It used to be treated as a species, which was known as A. mobrii. The English name "Mohr's Bluestem" reflects this treatment.
(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.)
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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