197 



Fig. 191. GYMNOPOGON AMBIGUUS (Michx.) B. S. P. Prel. Cat. N. Y. 69. 

 1888. {Andropogon ambiguus Miehx. Fl. Bor. Am. 1:58. 1803. G. racemosus 

 Beauv. Agrost. 164. 1812.) NAKED BEARD-GRASS.— A loosely tufted erect or 

 ascending perennial 3-6 dm. (lo-2°) high, with short and broad leaf-blades and 

 numerous (fifteen to thirty) slender, and widely spreading spikes 10-20 em. 

 (4'-8') long, spikelet-bearing throughout, irregularly scattered along the com- 

 mon rachis. Sheaths short, glabrous, excepting a villous ring at the summit, 

 crowded at the base of the culm; leaves 2-10 cm. (l'-4') long, -4-12 mm. (2"-6") 

 wide, lanceolate, acute. Spikelets (a) 5-6 mm. (2i"-3'0 long; empty glumes 

 (6) unequal; flowering glume (e) shorter than the second glume; awn 4-6 mm. 

 (2"-3'0 long. Callus hairy.— Dry soil, fields, hillsides, and borders of woods, 

 New Jersey, Indian Territory, Texas, and Florida. July to October. 



