TRIAXDKIA, DIOTNIA. If 



A well known and important grass, not a native, but now 

 completely naturalized in this country. Every where among 

 grass, particularly in meadows, quite common. Perennial. 

 June, July. 



45. Alopecvrvs, Gen pi. 102. (Gramines.J 



Calix 2-valved, 1 -flowered. Corolla 1-valvcd, 

 awned from the base. 



1. A. culm erect, glumes oval, obtuse, the llrn wjtiiiiim 



scarcely exserted. Jlicfu 



A foot high, leaves smooth, spike very long. On the mar- 

 gins of pools, in Jersey, near this city. Rare. Perennial. 



46. Panic i m, Gen. pi. 107. ( Graminex- ) 



Calix 3-valved, exterior valve often very small, 

 1-flowered, (mostly with the rudiments of a 

 sessile, neutral or masculine floret.) Corolla 

 (hermaphrodite) 2-valved, cartilaginous and 

 persistent. JK'utt. 



1. P. spikes alternate and verticillate by pairs; spike- cms gaiii. 



lets subdivided ; glumes awned hispid ; rachis 



five-angled. Sp. PL 

 P. hirtellum, Walt. 

 var. a muticum, valves of the calix without awns. 



/3. aristatum, just described. 



Cocks* -foot Panic am, 



A strong 1 rough plant two feet high, with dark brown co- 

 loured panicles. In damp places, very common. Perennial. 

 Flowers all summer. 



'2. P. culm assurgent, geniculate, very glabrous ; *enK-uiaiu». 



panicle terminal and axillary, diffuse and expand- 



ingi sheaths of the leaves inflated* Llliot- 

 P. dicotomiflomm, Mich* \ 

 Pi miliaeeum. Walt. 



