GENUS 40. GRASS FAMILY. 195 



2. Sporobolus neglectus Nash. Small Rush-grass. Fig. 465. 



Sporobolus neglectus Nash, Bull. Torr. Club, 22: 464. 1895. \ t 



Culms 6'-i2' tall, erect from a usually decumbent 

 base, slender, often much branched, smooth and gla- 

 brous. Sheaths about half as long as the internodes, 

 inflated; ligule very short; blades i" wide or less at the 

 base, smooth and glabrous beneath, scabrous and hairy 

 near the base above, attenuate into a slender point, the 

 lower elongated, the upper i'-3' long, setaceous ; ter- 

 minal panicle i'-2i' in length, usually more or less in- 

 cluded in the upper sheath, strict; lateral panicles en- 

 closed in the sheaths; spikelets about \\" long, the outer 

 scales acute, the lower one slightly shorter; third scale 

 acute, glabrous, a little longer than the second and about 

 equalling the acute palet. 



In dry soil, New Brunswick to North Dakota, Virginia 

 and Missouri. Aug.-Sept. 



3. Sporobolus clandestinus ( Sprang.) Hitchc. Rough Rush-grass. Fig. 466, 



Agrostis clandestine Spreng. Fl. Hal. Mant. 32. 1807. 

 S. clandestinus Hitchc. Contr. U. S. Nat. Herb. 12 : 

 150. 1908. 



Culms 2-5 tall, erect, simple, smooth and gla- 

 brous. Sheaths shorter than the internodes ; liguie 

 a mere ring, less than i" long, naked; blades 3'-i5' 

 long, i "-2" wide at the base, attenuate into a long 

 slender involute tip, smooth and glabrous beneath, 

 scabrous above, or somewhat hairy at the base; 

 panicle 2'-$' in length, linear, strict, its branches 

 i '-2' long, appressed; spikelets 3"~4" long, the outer 

 scales unequal, acute; third scale pubescent at the 

 base, much longer than the 1 second and greatly ex- 

 ceeded by the long-acuminate almost awned palet. 



In dry soil, Connecticut to Missouri, south to Florida 

 and Texas. Described and figured as S. asper in our 

 first edition. Prairie-grass. Aug.-Sept. 



4. Sporobolus canovirens Xash. Grey-green 

 Rush-grass. Fig. 467. 



Sporobolus canovirens Nash, in Britt. Man. 1042. 1901. 



Culms i-3 tall, erect; leaf-blades 10' long or less, 

 i"-ii" wide, attenuate and filiform above; panicle 

 2'-5' long; spikelets 2^-3" long, the scales acuminate, 

 the empty ones unequal, the flowering scale appressed- 

 pubescent below with long hairs, about equalling or a 

 little exceeded by the acute palet. 



Sandy soil, Tennessee to Missouri and Mississippi. 

 Sept 



