GRASS FAMILY. , 6 , 



5. Agrostis rubra L. Red Bent-grass. (Fig. 366.) 



Agrostis rubra L. Sp. PI. 62. 1753. 



Agrostis rnpestris Chapm. Fl. S. States, 551. 1860. Not 



'All. 



Agrostis rubra var. Americana Scribn.; Macoun, Cat. 

 Can. PI. 5:391- 1890- 



Smooth or very nearly so, glabrous, culms 6 / -2 tall, 

 erect or sometimes decumbent at the base, simple. 

 Sheaths usually shorter than the internodes; ligule \" 

 long; leaves 2'-$' long, X //-I K // wide; panicle 2%'- 

 5' in length, open, the branches generally widely 

 spreading and more or less flexuous, rarely erect, the 

 lower \'-2%,' long; spikelets \}"-\}i" long, tin- 

 outer scales acute, scabrous on the keel; thii< 

 shorter than the first, obtuse, bearing a usually bt-nt 

 dorsal awn 2 // -2^ // long, inserted below the middle. 



Summits of the highest mountains of New Kngland, 

 Nrw York and North Carolina. The American plant 

 may be specifically different from the European. Summer. 



6. Agrostis perennans (Walt.) Tuckerm. Thin-gr;i 



Cornucopias perennans Walt. Fl. Car. 74. 1788. 



Agrostis perennans Tuckerm. Am. Jonrn 



1843. 



Culms i-2 l /2 long from a det-umU-nt or proa- 

 trate base, weak, slender, simple or sparingly 

 branched above, smooth ami glabrous; li^ul. 

 long; leaves 2'-6' long, i"-2" wide, lax, acabruu*; 

 panicle 4'-S' in length, open, the branches I'-a 7 

 long, widely spreading, the branchlrts and pedi- 

 cels divergent; spikekts ! 4 "-i" long, the outer 

 scales acute, scabrous on the keel; third scale about 

 three-quarters the length of the first, smooth and 

 glabrous, not awned; palet small or 



In shaded damp places, Quebec and Ontario to Wt- 



consin, south to South Carolina and TenneMec. A*- 

 cends to 6600 ft. in North Panicle osoalljr 



light green, sometimes purplis 1 . July 



7. Agrostis hyemalis (Walt.) B.S.P. Rough Hair-grass. (Fig. 368.) 



Comucopiae hyemalis Walt.Fl. Car. 73. 1788. 

 Agrostis scabra Willd. Sp. PI. i: 370. 1798. 

 Agrostis hyemalis B.S.P. Prel. Cat. N. Y. 68. 1888. 



Culms i-2 tall, erect, slender, simple, smooth and 

 glabrous. Sheaths generally shorter than the inter- 

 nodes; ligule i // -2 // long; leaves 2 / ~5 / long, ^"-ij^" 

 wide, usually erect, roughish; panicle 6 r -2 long, usu- 

 ally purplish, the capillary scabrous branches ascend- 

 ing, sometimes widely spreading, or often drooping, 

 the lower 3'-6' long, dividing above the middle, tin- 

 divisions spikelet-bearing at the extremities; spikek-ts 

 3^//_ x // long, the outer scales acute, scabrous toward 

 the apex and on the keel; third scale two-thirds the 

 length of the first or equalling it, obtuse, rarely bearing 

 a short awn; palet usually very small. 



In dry or moist soil throughout nearly the who e of 

 North America except the extreme north. July-Aug. 



