204 



GRAMINEAE. 



Vol. I. 



Wet sands or brackish marshes along the coast, Maine and Quebec to Delaware. Also in Europe. 

 July-Sept. 



3. Agrostis asperifdlia Trin. Rough-leaved 

 Bent-grass. Fig. 489. 



Agrostis asperifolia Trin. Mem. Acad. St. Petersb. (VI.) 

 6: Part 2, 317. 1845. 



Culms i°-3° tall, erect, or sometimes decumbent at 

 the base, simple, smooth and glabrous. Sheaths usually 

 shorter than the internodes, smooth or roughish; ligule 

 i"-3i" long, more or less decurrent; blades I'-JJ' long, 

 1 "-4" wide, generally erect, flat or involute, scabrous; 

 panicle contracted, 2i'-io' in length, often interrupted 

 or glomerate, the branches 1F-3' in length, erect, spike- 

 let-bearing to the base; spikelets crowded, i"-ii" long, 

 the outer scales subequal, scabrous, especially on the 

 keel ; third scale about three-fourths the length of the 

 second, obtuse or subacute; palet minute. 



Manitoba to Washington, south to western Texas and 

 California. Northern Red-top. Aug.-Sept. 



4. Agrostis Elliottiana Schultes. Elliott's Bent-grass. Fig. 490. 



Agrostis arachnoides Ell. Bot. S. C. & Ga. 1 : 134. 181 7. 



Not Poir. 1810. 

 Agrostis Elliottiana Schultes, Mant. 2: 202. 1824. 



Culms s'-i4' tall, erect, slender, simple, smooth and 

 glabrous. Sheaths shorter than the internodes, smooth 

 or slightly scabrous, strongly striate; ligule 1" long; 

 blades rough, V~2' long, 1" wide or less; panicle 2'-s' 

 in length, usually narrow, sometimes open, the branches 

 slender, naked below, erect or ascending, the lower 

 l'-ii' long; spikelets I" long; outer scales subequal, 

 scabrous on the keel, acute; third scale about three- 

 quarters as long as the first, erose-truncate, acute or 

 2-toothed, bearing a very finely filiform flexuous bar- 

 bellate awn, 2-4 times its length, inserted just below 

 the apex ; palet short. 



In dry soil, South Carolina to Kentucky and Kansas, 

 Florida and Texas. Spider Bent-grass. May-July. 



5. Agrostis rupestris Allioni. Rock Bent- 

 grass. Fig. 491. 



Agrostis rupestris Allioni, Fl. Pedem. 2: 237. 1785- 



Culms tufted, 6' or less tall, slender, erect, or 

 decumbent at the base, smooth and glabrous. 

 Sheaths longer than the internodes ; ligule about 

 i" long ; blades smooth and glabrous, those on the 

 culm 1' or less long, the basal leaves from one-third 

 to one-half as long as the culms ; panicle contracted, 

 1' or less long, its axis and branches smooth, the 

 latter erect or nearly so, spikelet-bearing above the 

 middle; spikelets about 1" long; empty scales about 

 equal, i-nerved, acute, usually purple, hispidulous 

 on the keel; flowering scale shorter, hyaline, den- 

 ticulate at the obtuse or truncate apex, bearing 

 about the middle a dorsal scabrous awn a little 

 over 1" long; palet wanting. 



Labrador. Also in Europe. Summer. 



