56 TRIANDRIA DIGYXIA 



Muhl. Although completely naturalized, it is believed to be a foreigner. It affords 

 a tolerably good pasture for cattle ; and is valuable in swampy grounds,— which 

 its roots tend to consolidate : but it is not much esteemed tor hay,— and is now rare- 

 ly, if at all, cultivated in this County. 



2. A. alba, L. Culm decumbent, geniculate, radicating at the lower 

 joints; panicle contracted, at length spreading, with the branches very 

 scabrous ; palcxe Dearly equal, the lower one sometimes awned near the 

 tip; ligule oblong, lacerate. Heck-, BoU p. 387. 



A. decumbens. Muhl. Catul. p. 10. Ejusd. Gram. p. G8. Bart 

 Phil. I. p. 42. 

 White AeROBTls. 



Root perennial, creeping. Culm decumbent, paniculate, stoloniferous. Leaves 

 Linear-lanceolate, scabrous ; those of the suckers erect, subulate ; sheaths smooth; 

 ligule elongated, membranaceous. Panicle often dense, finally spreading, gre< n- 

 ish white, sometimes purple. Lower palea occasionally awned on the back- 

 the tip. 

 Flab. Wet meadows, and low grounds : frequent Ft June. Fr. July. 



Obs. Also a naturalized foreigner: and nearly related to the preceding. The 

 noted Fioriti grass, of Ireland, is considered a variety of this. 



3. A. LATEiiiFLoiiA, Mx* Culm ascending, nodose, branching above; 



panicles terminal and lateral, contracted, dense-flowered ; glumes acumi- 

 nate ; puleac mostly longer than the glumes, nearly equal, pubescent at 

 base. Beck, Bo}, p. 388. 



A. mexicana. Willd? Sp. 1. p. 374. Pers? Syn. 1. p. 76. Muhl. 

 CataL p. 10. Ejusd. Gram. p. 67. Bart. Phil. l./;.42. Also? PuPih, 

 Am, 1. p. 64. 



Muhlenbergia mexicana. Gray, Gram. 1. Spxcim. no. 14. 

 Lateral-flowered Agrostis. 



Root perennial, creeping. Culm erect, or ascendincr, 18 inches to 3 feet high, 

 with numerous swelling nodes, much branched, and leafy above, often naked be- 

 low. Leaves lanceolate, nerved, scabrous, especially on the upper surface ; sheaths 

 smooth, compressed, and but partially embracing the culm; ligule short) obtuse 

 and lacerate. Panicles numerous, terminating the branches) contracted) dense- 

 flowered, and somewhat spike-form; the lateral ones partly .sheathed at base. 

 Glumes narrow-lanceolate, acuminate, sometimes purple) often White, with a greeu, 

 scabrous keel. Palea nearly equal) pubescent at base, generally longer than the 

 glumes, sometimes twice as long; the lower one occasionally terminating in au 



awn. 



Hob. Moist grounds: Borders of woods, and fields : common. Fl. Aug. JY.Sept. 

 Obs. This species affords an indifferent pasture, in the latter part of summer; 

 but is not valuable. The A filiformis, Muhl. which Prof. Torrey makes a. variety 

 of this,— with erect culm and branches, filiform panicles, and glumes often as long 

 as the paieae,— is also frequent here. 



4. A. sobolifera, Muhl. Culm erect, somewhat branching ; pan iclc 

 simple, very slender or filiform, with the branches apprcssed ; palea 

 equal, longer than the glumes, hairy at base ; the lower one mucronate 

 at apex. Beck, Bot. p. 388. 



Muhlenbergia sobolifera. Gray, Gram. 2. Specie, no. 107. 



SoBQUFEBQUS AgUOSTIS. 



