Flora of North America species comparison

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Andropogon tracyi

Tracy's bluestem
Habit Plants cespitose, upper portion dense, cylindrical.
Culms

50-120 cm;

internodes not glaucous;

branches mostly erect, straight.
Sheaths

smooth;

ligules 0.2-0.5 mm, ciliate, cilia 0.2-0.8 mm;

blades 10-22 cm long, 1.2-2.6 mm wide, glabrous or sparsely pubescent, with spreading hairs.
Inflorescence units

3-11 per culm; subtending sheaths (2.8)4.1-5.8(7.2) cm long, (3)4-4.7(5.8) mm wide;

peduncles (9)14-31(65) mm, with 2 rames;

rames (1.5)2.4-3.6(4.2) cm, usually exserted at maturity, pubescence increasing in density distally within each internode.
Sessile

spikelets (4)4.8-5(5.5) mm;

callus hairs 1.5-3.5 mm;

keels of lower glumes scabrous only above the midpoint;

awns 11-23 mm;

anthers 1, 1.2-2 mm, yellow.
Pedicellate

spikelets vestigial or absent.
2n

= 20.

Andropogon tracyi
Distribution
from FNA
AL; FL; GA; MS; NC; SC
[WildflowerSearch map]
[BONAP county map]
Discussion

Andropogon tracyi grows on sandhills, sandy pinelands, and scrublands of the southeastern United States. It resembles A. longiberbis, but usually differs in having sparsely pubescent blades and a more slender appearance.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 25, p. 659.
Parent taxa Poaceae > subfam. Panicoideae > tribe Andropogoneae > Andropogon > sect. Leptopogon
Sibling taxa
A. arctatus, A. bicornis, A. brachystachyus, A. floridanus, A. gerardii, A. glomeratus, A. gracilis, A. gyrans, A. hallii, A. liebmannii, A. longiberbis, A. ternarius, A. virginicus
Name authority Nash
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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