GRAMINE^. 432 AGROSTIS. 



/S. fil/formis { Torr. A. filiformis. Muh.) ; stem erect j 'panicles very slender ; 

 palccc scarcely longer than the glume. 



4. A. soboli'fera. Muh. Mulilenbergia. Gray. 

 Stem erect, slender, producing shoots at base, sparingly branched, 18 — 30 



inches high; brajiches erect and HWihrm; ywdes not sweUing; leaves \inea.r- 

 lanceolate, with open sheaths; panicle simple, filiform, with appressed 

 branches, and crowded spikelets: pulea equal, longer than the acute glumes. 

 Rocky hills. Aug. 



5. A. ViRcr'NicA. L. Vilfa vaginiflora. Gray. 

 Stems numerous, assurgent, procumbent and hairy at base, nearly simple, 



about a loot long; leaves somewhat :i-rowed, involute, rigid, erect, 2 — 3 inches 

 long, with smooth sheaths which are hairy at the throat and swollen with the 

 enclosed panicles; panicles spike-form, terminal and lateral, the lateral ones 

 concealed ; glumes nearly equal, about as long as the subequal paleaj. Sandy 

 soils. Sept. Oct. 



6. A. losgifo'lia. Torr. 



Stem erect, simple, 2 — 4 feet high ; leaves 2 feet long, filiform at the end, 

 with smooth, closed sheaths and bearded stipules ; panicles terminal and later- 

 al, contracted into a spiked form, generally concealed in the swelling sheaths ; 

 glumes much shorter than the subequal, smooth, spotless palea;. Sandy 

 fields. Sept. Oct. 



* * Paleffi awned. 



7. A. clandesti'na. Sprcng. 



Stem terete, rigid, erect, smooth, about 2 feet high ; leaves very long, rigid, 

 glaucous, scabrous on the margin ; jianicle contracted, chiefly concealed ; 

 palea unequal, much longer than the glumes, slightly awned, hairy and spot- 

 ted. Dry hills. Sept. 



8. A. sylva'tica. Torr. Muhlenbergia. Gray. 

 Stem ascending, 2 — 3 feet long, much branched, diffuse, smooth, with 



swelling nodes; ieaues lanceolate, scabrous, nerved, 4 — 6 inches long, with 

 smooth, open sheaths ; panicles slender, rather dense ; glumes nearly equal, 

 acuminate, a little shorter than the palece; awn several times longer than the 

 spikelct. Rocky shades. Sept. 



9. A. tenuiflo'ra. Willd. Muhlenbergia. Gray. 

 Stem erect, subsimple, pubescent at the nodes, with a few appressed 



branches ; leaves 6 — 9 inches long, 2 — 3 lines wide, lanceolate, nerved, sca- 

 brous, spreading, with pubescent sheaths ; panicle contracted, very slender 

 and lono-, with remote, filiform branches ; glumes subequal, acuminate, half 

 as lon<T as the palese ; aion 3 — 4 times the length of the spikelet. Rocky 

 woods. July. Aug. 



10. A. cani'na. Dog's Bent Grass. 



Stem prostrate, somewhat branched, rooting at the lower nodes, about 2 feet 

 lonor; panicle at length spreading, with angular, rough branches ; glumes 

 elona-ated ; lower palem furnished with an incurved awn upon the beak twice 

 its length. Introduced and common in wet meadows. July. 



11. A. STRICT a. Bent Grass. 



Stem erect, smooth, with black nodes ; Zct/ws linear-lanceolate, scabrous on 

 the margin, with cleft, white stipules ; panicle elongated, strict, the branches 

 about .3, flexuous, scabrous, erect; glumes equal, lanceolate ; palem unequal, 

 smaller than the glumes, with an awn at the base of the outer one longer than 

 the flower. Fields. June. 



12. A. crypta'ndria. Torr. 



Panicle pyramidal, with spreading, generally alternate branches, hairy at the 

 axils ; flowers subracemed ; lower glume very short, upper one as long as the 

 nearly equal paleae ; stems 3 feet high ; sheaths bearded at the throat. Very 

 abundant at Buffalo. Aikin. 



