MOKOCOTYLEDONOUS OR ENDOGENOUS PLANTS. 603 



linetir and 1-nerved, the iipiier obovate, S-nerved; j!?«to 

 unequal, the lower one obtuse ; stamens 3 ; grain linear- 

 oblong. 



E. Pennsylvanica, Gray. Panicle slender, loose, the 

 2-3-flo\vered 5/;iX'eZe^s scattered on the slender branches ; 

 ghimes sliglitly roughened on the back, the upper one obo- 

 vate, obtuse, or abruptly short-pointed; lower jjalea obtuse; 

 leaves flat, with the sheaths smooth, rough, or soft-doAvny. 

 (Aira mollis, Ell) Upper districts. April. Culms l°-2°. 

 Perennial. 



MELICA, L. 



Perennial grasses, with flat leaves, and 3-5-flowered 

 spihelets of large flowers in a simple panicle ; flowers awn- 

 less, the upper ones imperfect ; glumes membranaceous, 

 unequal, convex, obtuse, scarious on the margins, many- 

 nerved ; palece similar to the glumes, the upper one small- 

 er, concave on the back ; stamens 3 ; grain free. 



M. MUTiCA, Walt. Culms l°-2° high; leaves and 

 slieaths smooth or rough-pubescent ; panicle -loose, of few 

 nodding racemose spikelets ; vpp>er floioers imperfect, trun- 

 cate-obovate ; ^;a?m roughish. (M. glabra, Michx.) Dry 

 open woods. April. Witchita River. 



GLYCEEIA, Brown. 



Smooth perennial marsh or water grasses, with flat 

 leaves, nearly entire sheaths, and terete or tumid many- 

 floioered spikelets disposed in a simple or compound j9«?i/cZe; 

 r«c/u*5 jointed ; glumes membranaceous, obtuse, persistent; 

 palece nearly equal, somewhat chartaceous, obtuse, early 

 falling away with the separating joints of the rachis, the 

 lower one naked, convex, 7-nerved ; stamens 2-3 ; grain 

 free, oblong. 



G. NERVATA, Trin. Culms erect ; panicle difl'use, the 

 capillary branches at length drooping ; spihelets purplish, 



