396 



WEEDS AXD rSEFLL PLAXTy. 



fiower perfect, ^vith its lower palea convex with a short awn near the 

 apex ; imcest floret staminate onlv, bearing a long bent aivn on the back 

 below the middle ; otherwise nearly as in Arena. 



1. A. avexa'cei:]^!, Beauv. Leaves flat ; panicle linear-oblong, con- 

 tracted, finally spreading ; glumes unequal, the lower one shorter than 

 the florets. 



Oat-like AEEHEXATHERUii. Oat-grass. Grass of the Andes. 

 Fr. Avoins elevee. Germ. "Wiesen Hafer. 



Root perennial, creeping, nodose. Culm about 3 feet high, glabrous. Leaves 4 - 8 or 10 

 luclies long, lanee-linear, scabrous on the margin and upper surface ; sheaths striate, 

 smooth ; ligule short, retuse. Panicle linear-oblong, finally spreading and somewhat 

 nodding; — the branches short, semi-verticillate. 



Cultivated lots : introduced.' Xative of Eiarope. Fl. May. Fr. July. 



Ohs. This grass has been partially introduced, and cultivated, by a few 

 curious farmers ; but it does not appear to be much of a favorite, eithe- 

 for pasture or hay, in Pennsylvania. It is sometimes called Grass {A 

 the Andes,"' — but I know not for what reason, as it seems to be of un- 

 doubted European origin. 



Flixt in his treatise upon Grasses, speaks favorably of this grass, re- 

 marking that it is esteem.ed by those who know it for its early, rapid 

 and late grov/th, making it well calculated for a late pasture grass." 



24. HOLTUS, L. Yelvet-geass. 



[An ancient Greek name, of obscure derivation.] 



SpiMets crowded in an open panicle, 2-3-flowered ; /o?-(?f5 jointed with 

 their pedicels, somewhat remote, enclosed and exceeded by the membra- 

 naceous boat-shaped glumes. Lou-er floret perfect, but 'its thin lower 

 palea awnless ; upper flower staminate only, with a bent awn below the 

 tip. Stamens 3. Styles plumose to the base. Grain free, smooth. 



1. H. lana'tus, L. Softly hoary pubescent; panicle oblong, rather 

 contracted ; awn of the staminate' floret recurved, included in the glume. 



Woolly Holcus. Telvet-grass. Feather-grass. "Wliite Timothy. 



Fr. Honque laineuse. Foiu de mouton. Germ. WoUiges Honig-gras. 



Root perennial. Culm simple. 18 inches to 2 feet high. Leaves lance-hnear, acute, 2 -p5 

 or 6 inches long ; ligule white, trimcate, dentate. Panicle oblong, somewhat dense --thB 

 branches hairv. GZuni^s roughish-pubescent, whitish, often tinged with purple. Fiords 

 both pedicellate, smooth and shining. Paleoi of the perfect floret nearly equal m length, 

 the lower one broader, keeled,— of the staminate floret unequal, the lower oce larger, keel- 

 ed, with a recurved or hooked awn on the back near the apex. 



Moist meadows : introduced. Native of Europe. Fl. June. Fr. July. 



Obs. This grass is naturalized in many places in Pennsylvania. Soma 



