r>GO gu.\mim:.i:. ((;kass kamilv.) 



tliiiii till' ii\Mi-|i(iintcil tci'tli. (Uralc'pis coriiutii, Ell.) — Dry sandy soil, Florida 

 to Moitli t'aruliiiu. Auj;. and Sept. y.. 



2. T. purpurea. Culms procumhcnt or asfondinp, l°-lJ°long; leaves 

 and slicatlis smooth or rougliisii ; lateral panicles incluiled ; awn of the lower 

 palea lieardo<l, about as lon<j; as the ohtuso teeth, and much shoHfr than tho 

 palese. ( Aira, Ell. Uralcpi* purpurea, Niitl.) — Drifting; sands along the coast, 

 Florida, and northward. Aug. -Oct. — Leaves I' -4' long. Si)ikelets bright 

 purple. 



26. EATONIA, Uaf. 



Slender erect and tufted grasses, wiih narrow leaves, and small smooth (not 

 hairy) spikelets of ])ale flowers in a racemose or spicatc panicle. Spikelcts awn- 

 less, 2 -5-flowered, tiie u])pcrmost flower usually an awn-like pedicel. Glumes 

 membranaceous, shorter tlian the flowers ; the lower one linear and 1 -nerved ; tho 

 upper obovatc, 3-nerved. Paleae uneijual, the lower one obtuse. Stamens 3. 

 Grain linear-oblong. 



1. E. obtusata, Gray. Panicle dense, spike-like, the 2-flowcrcd spikelets 

 much crowded on the short erect branches ; glumes rough on the back, the upjjcr 

 one round-obovate, somewhat truncate, rather rigid ; lower palea lanceolate- 

 oblong, obtuse, rougli-keeled. (Aira obtusata, Mir/ix.) — Dry soil, Florida, and 

 northward. April and May. IJ. and — Culms ]°-2° high. 



2. E. Pennsylvanica, Gray. Panicle slender, loo<e, the 2-3-flowcred 

 spikelcts scattered on the slender branches ; glumes sligiitly roughened on tho 

 back, the upper one olwvate, obtuse, or abruptly short-pointed ; lower palea ob- 

 tuse ; leaves flat, with the sheaths smooth, rough, or soft-downy. (Aira mollis, 

 /://.) — Ujiper districts. April. U — Culms l°-20 high. 



Var. ■? filiformis. Culms 1° high, very slender, barely longer than the fili- 

 fonn involute leaves ; panicle linear, loo.sc ; spikelets scattered, mostly 3-flowered, 

 the flowers distant on the rachis, the lowest one and glumes nearly smooth. (Aira 

 mollis, var. Eli) — Dry pine barrens, Florida to South Carolina. March. 



27. MELICA, L. 



Perennial grasses, with flat leaves, and 3 -5-flowered spikelets of large flowers 

 in a simple panicle. Flowers awnless, the upper ones imperfect. Glumes mem- 

 branaceous, unequal, convex, obtuse, scarious on the margins, many-nerved. 

 PalcsE similar to the glumes ; the upper one smaller, concave on the back. Sta- 

 mens 3. Grain free. 



1. M. mutica, Walt. Culms l°-2°high; leaves and sheaths smoother 

 rough-pubescent ; panicle loose, of few nodding racemose spikelets ; upper flow- 

 ers imperfect, truncate-obovate ; palea roughish. (M. glabra, Michx.) — Dry- 

 open woods, Florida, and northward. April. 



28. GLYCERIA, Brown. 



Smooth perennial marsh or water grasses, with flat leaves, nearly entire sheaths, 

 and terete or tumid many-flowered spikelets disposed in a simple or compound 



