THIANDRIA D1GYXIA 57 



Root perennial, creeping. Culm slender, about 2 feet high, sobolifcrous and 

 sometimes decumbent at base, sparingly branched ; branches erect and filiform , 

 nodes not swelling Leaves narrowish, lance-linear, 4 to Cinches long, scabrous : 

 sheaths open, smooth; Ugtde short, truncate (none, MuhL). Panicles filiform, 

 resembling very slender spikes; branches alternate, or in pairs, appresscd ; spike- 

 lets crowded. Glumes acute. Pale* about one third longer than the glumes, awn- 

 less, hairy at base ; the lower one keeled, roughish, mucronale. 

 llab. Open, rocky woodlands: frequent. K.August. Fr. Sept. 



Obs. This resembles the var. filiformis, of the preceding species ; but has, gen- 

 erally, fewer branches, or lateral panicles. 



5. A. TiRGixicA, Muhl. Culms numerous, procumbent at base, as- 

 surgent; leaves subdistichous, involute, rigid; panicles spike-form, ter- 

 minal and lateral, the lateral ones concealed; glumes nearly equal, 

 about as long as the palex. Beck, Bot. p. 389. Not ? of L. Wilhl 



nor EIL 



A. pungens. Pursk, .>hn. 1. p. 64. Not of Schreb. Willd. nor Pers. 



Vilfa vaginifiora. Gray, Gram. 1. Specim. no. 3. 



V I n f; I n i A V A a n OST I s. 



Root annual - 1 fibrous. Culm 9 to 18 inches l*>ng, nearly simple, somewhat ccs- 

 pitose, assurgent, often procumbent, geniculate, scabrous below the nodes. Leaves 

 2 to 3 inches long, erect, subulate, rigid, involute and filiform at the point, some- 

 what scabrous, pilose at base : deaths smooth, pilose at throat, often loose, and 

 tumid with the enclosed panicles ; UguUobs dele. Panicles oblong, compressed, 

 spike f>rm ; branches very short, scabrous, alternate or in pairs. Glumes nearly 

 equal, lanceolate, acute, keeled, membranaceous. Palcoz nearly equal, about a* 

 I nvx as tiie glumeA raomeiimea rather aharteA) ovate-lanceolate, acute, pubescent. 

 Stamens mostly wanting in the lateral panicles. 



Hub. Dry, sandy banks; road-sides: frequent. Fh Aug. Fr, Sept. 



Obs. Although this species differs much, in habit, from the others, I do not per- 

 ceive sufficient grounds for a generic distinction. 



• * Pal ex owned. 



(>. A, tbnuifloba, lYUUL Culm erect, nearly simple, pubescent about 

 the joints; branches appresscd; panicle contracted, very slender; palete 

 twice as long as the glumes. Beck, Bot. p. 388. 

 Muhlenbcrgia Willdenovii. Gray, Gram. 1. Specim. ho. 12. 



S J. B X I) E H-FLO WERED Ag ROSTIS. 



Root perennial, creeping. Culm about 3 feet high* simple, or with a few appres- 

 sed branches, rctrorsely pubescent near the nodes. Leaves broad ish, lanceolate, 

 nerved, scabrous, G to 9 inches long, spr< ading: sheaths roughish pubescent; li- 

 gule obsolete, or very short. Panicle long, very slender; with long, rather re- 

 mote, filiform, erect branches. Glumes nearly equal, lanceolate, acuminate. Pa- 

 lea about twice as lon# as the glumes, s< abrous, i »ilosc at base ; lower one termi- 

 nating in an awn 3 oj 1 times as long as the spikelet. 



Hub. Open woodlands : frequent. FL Aug. Fi. September. 



7. A. stltatica, Torr, Culm ascending, much branched, diffuse, 

 nodose, smooth ; panicle slender, somewhat dense-flowered ; pale© rath- 

 er longer than the glumes. Beck, Bot. p. 388. Not of Willd. 

 A. diffusa. MuhL Catal f>. 10. Ejusd. Gram. p. 64. Not of Ihst. 

 Muhlenbcrgia sylvatica. Gray, Gram. 1. &jpegi:k. no. 13. 

 Wood Aguostis. 



