400 



ORDER 155. GRAMINE^E. 



42. EATONIA, Raf. Spkl. mostly 2-flowered, 

 numerous, panicled, silvery. Glumes unlike, the 

 lower linear, 1-veined, the upper broadly obovate, 

 rounded and 3-veined on the back. Pales obtuse, 

 chartaceous, awnless. Grain oblong. if Deli- 

 cate grasses with simple culms. 



1 E. obtusata (Mx.) Panicle narrow, dense, 35' by i 1' ; branches short, ap- 



pressed ; spkl. (a, b) U" long, 2-flwd.. tumid ; pales (c) scarious at tip, a little longer 

 than the very obtuse upper glume. Dry. Penn. to Wis., and S. June, July. 2f. 



2 E. Pennsylvania (DC.) Panicle 5 10', slender, open and loose; spkl. 1J"; 



upper gl. abruptly short-pointed, or obtuse ; upper flower exserted half its length. 

 Shady rocks and meadows. Elegant. Summer. 2f. 



43. MELICA, L. MELIC G. Glumes unequal, ob- 

 tuse, 2-5-flowered. Fls. exserted, the upper incomplete. 

 Pales truncate, veiny as well as the glumes. Grain free. 



It Lvs. flat; spkl. pedicellate, in a subsimple panicle. ,, 



HI. mutica Walt. Culm 3 4f ; Ivs. linear, flat; pan. few-flwd., inclined to one side; 



spkl. (e) 46" long, with 2 fertile fls., and the third upper one contorted; pales (/) 



unequal, veined. Penn. to Wis., and S. 



44. ERAGROSTIS, Beauv. Spkl. 2-oo -flwd., membranous. Lower 

 pale carinate, 3-veined, never webby at base, upper pale 



persistent on the flexuous rachis after the free grain and 

 lower pale have fallen. Culm simple or branched. 

 Leaves often rolled, bearded at the throat. Panicle with ^J| 

 hairy axils. 



Culms branched, prostrate; spikelets sub-sessile No. 1 



5 Culms branched, ascending; panicles 13 Nos. 2 7 1 



Culms simple, erect, shorter than its loose pan...Nos. 8 11 



1 E. reptaiis Nees. Culms creeping and rootinjr, C> 12' ; Ivs. 



subulate, 1 2' ; panicles many, small, dense ; spkl. lance-lin- 

 ear ; fls. 10 30, very acute. (I) Banks. August. 



2 E. poscoides Beauv. (a) Culms ascending, 1 2f ; Ivs. linear, flat; panicles oblong, 



dense, 2 6', compound ; spkl. (6) ovate-oblong, 3 5", 8-50-flwd., turning white; 

 fls. (c) obtuse, 3-veined ; (cl, grain). (T) Handsome, but ill-scented. Fields. 



3 E. pilosa L. Culms in tufts, ascending, 412' ; Ivs. linear, flat, tender ; panicles 



oblong, loose ; spkl. linear, bluish, about as long (2 4") as their pedicels ; flowers 

 412. obtuse, with only the midvein apparent. Dry, sandy places. July. 



4 E. Purslill Schr. Culms ascending, 6 12 20'; Ivs. 1 3', very narrow; panicles 



long and loose ; ped. capillary ; spkl. linear-oblong, 2 4"; fls. 5 12, acute or acutish, 

 3-veined. purplish. (T) Dry fields, N. J., Penn., and S. Common. July, August. 



5 E. eryUirtfgona Nees. (E. Frankii Meyer.) Culms in tufts, much branched, 



ascending, (518', joints red ; pan. narrow, beardless, 24' ; spkl. about 1", their pcd. 

 much longer ; gls. and pales very acute, obscurely 3-veincd. Dry. Pa. to 111., and S. 



6 E. cillaris (L.) Culms decumbent and ascending, 612'; pan. cylindrical, 



branches appressed. covered with the minute ft") ovate epikclets ; fls. 57, mucro- 

 nate, upper pale ciliate-fringed. (T) Waste grounds, South. 



7 E. coiiierta Trin. Culm stout, erect, 2 3f: Ivs. broad-linear; pan. long (512'), 



narrow, branches erect, covered with innumerable small (1 1$") epikelets; fl. 7--11, 

 hyaline, obtuse, 3-veined, whitish. River bank?, S. Aug., Sept. 



