MANUAL OF THE GRASSES OF THE UNITED STATES 



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wide; inflorescence decompound, 

 loose, the ultimate capillary branch- 

 lets commonly recurved, long-villous 

 toward the summit; spathes slender, 

 the long peduncles often exserted 

 from the summit; racemes 2, flexuous, 

 mostly 1 to 1.5 cm. long, the rachis 

 joint and pedicel long-villous; sessile 

 spikelet about 4 mm. long, the awn 

 scarcely 1 cm. long. % — Moist 

 pine woods, southern Georgia and 

 Florida. The racemes are frequently 

 affected by a smut, making them 

 shorter and denser, reducing the size 

 of the spikelet and the awn. The 

 inflorescence resembles that of A. 

 capillipes, but the racemes mostly 

 more numerous; the ultimate branch- 

 lets are long-villous toward the sum- 

 mit and the spikelet s larger. 



25. Andropogon capillipes Nash. 

 (Fig. 1164.) Plants conspicuously 

 glaucous; culms tufted, slender, erect, 

 60 to 100 cm. tall, the upper third to 

 half with few to several slender 

 branches; sheaths crowded at base, 



Figure 1163. — Andropogon brachystachys, X 1. (Cur- 

 tiss 3632, Fla.) 



Figure 1164. — Andropogon capillipes, X 1. (Curtiss 

 3638b, Fla.) 



keeled, chalky-glaucous; blades most- 

 ly folded, 2 to 4 mm. wide; inflores- 

 cence narrow but loose, the branches 

 often flexuous to zigzag, the ultimate 

 capillary branchlets finally spreading 

 or recurved, glabrous, the dilated 

 purplish-brown spathes 2 to 3.5 cm. 

 long, glabrous; racemes 2, less flexu- 

 ous than in A. virginicus, 1 to 2.5 

 cm. long; rachis joint about half as 

 long as the sessile spikelet, the pedicel 

 about equaling the spikelet, both 

 copiously long-villous; sessile spike- 

 let 3 mm. long, the delicate straight 

 awn about 1 cm. long. % — 

 Sandy pine and oak woods, southern 

 North Carolina, South Carolina, and 

 Florida. 



26. Andropogon virginicus L. 

 Broomsedge. (Fig. 1165.) Culms 

 erect, 50 to 100 cm. tall, usually in 

 rather small tufts, the upper two- 

 thirds mostly freely branching; lower 

 sheaths compressed, keeled, equitant; 

 sheaths glabrous or more or less 

 pilose along the margins, occasionally 

 conspicuously so; ligule strongly cil- 

 iate; blades flat or folded, 2 to 5 mm. 

 wide, pilose on the upper surface 

 toward base; inflorescence elongate, 

 narrow, the 2 to 4 racemes 2 to 3 

 cm. long, partly included and shorter 

 than the inflated tawny to bronze 



