GENUS 6. 



GRASS FAMILY. 



3. Andropogon Elliottii Chapm. Elliott's 



Beard-grass. Fig. 266. 



Andropogon Elliottii Champ. Fl. S. States, 581. 1860. 

 Culms erect, i-3 tall, simple or sparingly 

 branched above, the branches strongly bearded at 

 the upper nodes ; sheaths glabrous or loosely 

 villous, the lower narrow, the upper elongated, 

 inflated, imbricated ; blades 2'-io' long, i"-2i" 

 wide; racemes in pairs, rarely in 3's, i'-2' long, 

 loose, some of them long-exserted ; rachis 

 slender, flexuous, its joints and the pedicels 

 pubescent with long spreading silky hairs; outer- 

 most scale of the sessile spikelet ii"-2" long, 

 scabrous on the keel ; awn 6"-o." long, scabrous ; 

 pedicellate spikelet a minute scale or wanting. 



In dry or moist places, southern New Jersey to 

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



4. Andropogon ternarius Michx. Silvery Beard-grass. Fig. 267. 



Andropogon ternarius Michx. Fl. Bor. Am. i : 57. 1803. 

 Andropogcn argent eus Ell. Bot. S. C. & Ga. I : 148. 



1817. Not DC. 1813. 



Andropogon argyraeus Schultes, Mant. 2: 450. 1824. 

 Andropogon Belvisii Desv. Opusc. 67. 1831. 

 Andropogon mississippiensis Scribn. & Ball, Bull. U. S. 



Dep. Agr. Agrost. 24: 40. 1901. 



Culms erect, 2-4 tall, simple at base, generally 

 much branched above ; sheaths somewhat compressed, 

 glabrous or pubescent; basal leaves 6'-i; upper 

 2'-8' long, i"-ii" wide, acuminate, smooth to sca- 

 brous above, glabrous or pubescent beneath ; racemes 

 i'-2' long, on more or less exserted slender pedun- 

 cles; joints of the rachis and pedicels pubescent with 

 long silky white spreading hairs ; outermost scale of 

 sessile spikelet 2$"-3i" long, acuminate, scabrous ; 

 awn loosely spiral, 6"-i2" long, scabrous ; pedicellate 

 spikelet reduced to a minute lanceolate acuminate 

 scabrous scale, which is early deciduous. 



In dry sandy soil, Delaware to Missouri, south to 

 Florida and Texas. Sept. Silver-beard. 



5. Andropogon Cabanisii Hack. Cabanis' 

 Beard-grass. Fig. 268. 



Andropogon Cabanisii Hack. Flora 68: 133. 1885. 



Culms 2-3i tall, the branches in i's or 2's; 

 sheaths smooth or a little roughened ; blades 10' 

 long or less, i"-2" wide, smooth beneath, rough 

 above ; racemes in pairs on a peduncle which is 

 densely barbed at the apex, ii'-3' long, grayish, 

 the hairs at the apex of the internodes about 

 equalling them, rather scant ; sessile spikelets 

 2$"-3$" long, broadly lanceolate, tapering from 

 the middle, the first scale strongly hispidulous and 

 2-5-nerved between the keels, the nerves running 

 the entire length of the scale, the fourth scale 

 bearing a very slender awn x'-il' long, slightly 

 spiral at the base ; pedicellate spikelets of a single 

 hispidulous scale. 



In sandy places, Pennsylvania (according to 

 Hackel) and Florida. 



