Andropogon liebmannii
Andropogon floridanus
Liebmann's bluestem, Mohr's bluestem
Florida bluestem
20-170 cm;
internodes not glaucous;
branches mostly erect, straight.
70-210 cm;
internodes occasionally somewhat glaucous just below the node;
branches straight, mostly erect to ascending.
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.
often scabrous, somteimes smooth;
ligules 0.4-1.2 mm, ciliate, cilia 0.2-1.3 mm;
blades 32-61 cm long, 2.9-5 mm wide, glabrous, rarely sparsely pubescent.
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.
(9)50-210 per culm; subtending sheaths (3)4-5.9(7) cm long, (1.5)2-2.7(3.6) mm wide;
peduncles (10)19-48(93) mm, with 2(4) rames;
rames (2)2.5-3.7(4.5) cm, usually exserted at maturity, internodes evenly pubescent.
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 (3.8)4.4-4.8(5.5) mm;
callus hairs 1-3 mm;
keels of lower glumes glabrous below midlength;
awns 5-15 mm;
anthers 1(3), 1.3-2 mm, usually yellow (sometimes purple).
spikelets vestigial or absent.
spikelets vestigial or absent.
= 20.
= 20.
Andropogon liebmannii
Andropogon floridanus
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 floridanus grows on sandy soils in southeastern Georgia and Florida, being most abundant in Pinus clausa scrublands. It usually occurs in small stands, but stands of about a hundred individuals have been observed.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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