TRIANDRIA, DIUYNTA. 43 



lanceolate, nerved, scabrous. Ligula white acu- 

 minate, apex 4- fid. Sheath striate smooth. Pani- 

 cle at length diffuse. Branches verticillate. Cal. 2- 

 valved acute equal carinated, carina rough, green. 

 Cor. 2-valved less than the calix, white, smooth at 

 the base, valves unequal, awnless. Stam. 3, anthers 

 yellow. Muhl. 



A. alba, Schrader. 



A. hispida, Willd. 



Herds-grass. 



Wild in woods, and also much cultivated. Dr. Muhlenberg 

 hints that this species may be identical with A. dispar, Mich, 

 and A. alba, and vulgaris, of the Hortus Kewensis. 



5. A. culm erect; panicle finally diffuse purplish, Tuigari% 

 Branches verticillate, and the little branches sca- 

 brous. Cal. 2-valved equal glabrous. Cor. 2- 

 valved smaller than the calix. Jfuhl. 



Red- top. 



Very frequent in similar places with No. 4 in Jersey, and 

 also in the Neck, this side of the river. Perennial. June. 



6. A. culm erect, terete, jointed, joints smooth, bndcjum, 

 L aves linear very long, nerved, stiff, some\\hat MuhK 

 rough on the margins, gl iucous. Ligula none or 

 small. Sheath long, hairy at the mouth. Panicle 

 narrow terminal and lateral, hidden, and often 

 somewhat spike- formed. Branches alternate, 



with the smaller ones smooth. Cal. 2 valved, 



valves white unequal, carinated smooth. Cor. 2- 



valved, twice the length of the calix. 

 Perh ips Agrostis aspcra, Mich. 



Varies in size from nine inches to two feet. In this vicinity 

 it is of low stature, seldom exceeding- nine or ten inches ; but 

 I have seen it on the borders of the Conestogot- creek, near 

 Lancaster, two feet high. On the high gravelly banks or hills, 

 ■eat the canal road, and the Reservoir or Basin. Very rare. 

 Perennial September. 



