IO2 



GRAMINEAE. 



4. Andropogon furcatus Muhl. Forked 

 Beard-grass. (Fig. 219.) 



Andropogon furcatus Muhl.; Willd. Sp. PI. 4: 919. 



1806. 

 Andropogon proi'incialis subvar. furcatus Hack, in 



DC. Mon. Phan. 5: 442. 1889. 



Culms erect, stout, smooth and glabrous, 3-6 

 tall, simple at base, branched above. Sheaths 

 smooth and glabrous; leaves smooth or rough, 6'- 

 18' long, 2 // ~7 // wide, acuminate ; spikes 2-5, in 

 pairs or approximate at the summit, 2 / ~5 / long ; 

 joints of rachis and pedicels ciliate with short 

 hairs ; outermost scale of sessile spikelet $ ff -\' f 

 long, twice the length of the rachis joints, scab- 

 rous ; awn 5"-7" long, loosely spiral ; pedicelled 

 spikelet consisting of 4 scales. 



In dry or moist soil. Maine and Ontario to Manitoba, 

 south to Florida, Kansas and Texas. Aug. -Sept. 



5. Andropogon Virginicus L. Virginia Beard-grass. (Fig. 220.) 



Virginictts\^ Sp. PI. 1046. 1753. 

 Cinna'laieralis Walt. Fl. Car. 59. 1788. 

 Andropogon dissififlorits Michx. Fl. Bor. Am. i: 



57- 1803. 

 Andropogon I'aginatus EH. Bot. S. C. & Ga. i: 



148. 1817. 



Culms erect, smooth, 2-4 tall, simple at 

 base, branching above. Sheaths smooth; leaves 

 6'-i long, i // -3 // wide, long-acuminate, scab- 

 rous on the margins; branches of culm short, 

 forming a loose and elongated inflorescence ; 

 spikes in pairs, occasionally 3 or 4, about \' long, 

 loose, protruding from the sides of the spathes; 

 rachis flexuous, slender, the joints and pedi- 

 cels pubescent with long spreading silky hairs; 

 lowest scale of sessile spikelet about \y 2 " long; 

 awn 4 // ~9 // long, straight, scabrous; pedicelled 

 spikelet generally wanting, occasionally a rudi- 

 mentary scale present. 



In dry or moist fields, Massachusetts to Pennsyl- 

 vania and Illinois, south to Florida and Texas. 

 Also in Cuba. Aug. -Sept. 



6. Andropogon glomeratus (Walt.) B. S. P. Bushy Beard-grass. (Fig. 221.) 



China glomerata Walt. Fl. Car. 59. 1788. 

 Andropogon macron rum Michx. Fl. Bor. Am. i: 56. 



1803. 

 Andropogon glomeratus B. S. P. Prel. Cat. X. Y. 67. 



Culms erect, i l / 2 -Z tall, smooth, simple below, 

 much branched above, upper nodes of branches 

 barbed. Sheaths compressed, smooth to strongly 

 scabrous, glabrous or pubescent ; leaves i // -2 // 

 wide, scabrous, long-acuminate, the basal two-thirds 

 as long as or equalling the culm, those of the culm 

 6 / -i8 / long ; branches elongated, forming a com- 

 pact terminal inflorescence ; spikes in pairs, about 

 i' long, loose, protruding from the sides of the 

 scabrous spathes ; rachis flexuous, the joints and 

 pedicels pubescent with long spreading silky hairs ; 

 outermost scale of sessile spikelet about \ l / 2 " long ; 

 awn 6"-9" long, scabrous; pedicelled spikelet 

 reduced to a single scale or wanting. 



Damp soil, southern New York to central Pennsylva- 

 nia and Florida, mostly near the coast. Sept.-Oct. 





