'I'm: (iKAssKs OK Tknneshkk. 99 



glumes usually obtuse ami awnless (the second floret sometimes 

 short, awned frotu the apex). Palea narrow, two-nerved. Styles 

 distinct, short; stigmas plumose, (irain narrow, free. 



Rather slender tufted perennials, with usually flat leaves and 

 narrow, but often lax, terminal, many-tlowered panicles. 



Species three, all natives of the eastern United States, two ex- 

 tending westward to the Rocky Mountains. 



KKV TO TFiK SPF.CIKS. 



1 . Leaves involute-filiform, the lower nearly as long as the culm. 



I. E. FILIFORMIS. 



I Leaves flat, the lower much shorter than the culm .... 2 



2. Second glume broadly obovate and very obtuse 3 



2. Second glume narrower and acutish, leaves 3 to 6 inches 



long 2. E. Pp:nnsvlvanila. 



3. First glume nearly as long as the third, leaves i to 3 inches 



long . . . ' 3. E. DuDLEVi 



3. First glume >4 to -3 as long as the third, leaves longer . . 



4. E. Oin USATA. 



1 . Eatonia filiformis Vasey. 



Plate XXXIIL Figure 132. 



An erect, tufted perennial, one to two feet high, with very long 

 upper internodes and long involute radical leaves. Sheaths 

 smooth or pubescent; ligule very short or none; leaf-blade fili- 

 form-involute, those at the base nearly equalling the culm. Pani- 

 cle narrow, rather loosely flowered, slender, three to six inches long, 

 the branches erect. Spikelets two-flowered, scattered along the 

 branches, about one and one-half lines long. Lower empty glume 

 linear,acute: the upper narrowly obovate, obtuse; flowering glumes 

 about one line long, somewhat obtuse, smooth, the glume of the 

 second flower occasionally short-awned on the back just below the 

 apex. 



Dry hills, Chester county, (S. M. Bain). 



2. Eatonia Pennsylvanica Gray. 



Plate XXXIV. Figure 133. 



A slender, pale-green perennial with flat leaves and narrow ter- 

 minal panicles. Sheaths mostly smooth; ligule about one line 

 long; leaf-blade one to two lines wnde, three to four inches long, 

 flat, scabrous on both sides. Panicle slender, three to seven inches 

 long, the branches nearly erect. Spikelets scattered along the 

 branches, two- or occasionally three-flowered; empty glunies a lit- 

 tle over one line long; the lower narrowly linear with scabrous 

 keel, the upper narrowly obovate, acute or obtuse, slightly sca- 

 brous on the nerves. Flowering glume about one and one-half 

 lines long, acute, somewhat scabrous on the back above. Leaves 

 of about equal length throughout. 



Moist meadows over the State. May — June. This grass is con- 

 spicuous in a meadow on account of its pale-green color. 



