GRAMINEJ2. ( GRASS FAMILY.) 627 



rootstocks ; the spikclcts paniclcd. (Name from yXvKfpus, sweet, in allusion to 

 the taste of the grain.) 



§ 1. GLYCERIA proper. Tjower palet conspicuously nerved: styles present: 

 plumes of the stlcjma branched or toothed: grain grooved on the inner side: 

 Itavesflut, the sheaths nearly entire. 



* Spilcelets ovate, oblong, or linear-olilong, 1" -.3" in length, 

 -t- At length nodding in an open panicle, JiuUish laterally but turgid. 



1. G. Canadensis, Trin. (Rattlesnake-Gka.s.s. ) Panicle ohlong- 

 pyraniidal, at length (lroo])ing ; spikelets ovate, at length very broad and tu- 

 mid, Briza-like, 2" long, pale, with purplish glumes ; lower palet acute or blunt- 

 pointed, firm, with not very prominent nerves, longer than the rounded upper 

 one; culm stout, 2° -3° high; leaves long, roughish. (Briza Canadensis, 

 il7/t7(x,)— Bogs and wet places : common from Penn. northward. July. 



H- ■^ Erect in a narrow contracted panicle, somewhat flattened and turgid. 



2. G. Obtusa, Trin. Panicle narrowly oblong, dense ; (3' -5' long); spike- 

 lets 6- 7-flowered ; 2" -3' long; lower palet obtuse; culm stout, l°-2°high, 

 very leafy; leaves long, smooth. (Poa obtusa, Muhl.) — Bogs, E. New Eng- 

 land to Pcnn., near the coast. 



3. G. elongata, Trin. Panicle narrowly racemose, elongated (1° long), 

 recurving ; the branches and 3 - 4-tiowered spikelets appressed ; lower palet ob- 

 tuse ; leaves very long (1° or more), rough. (Poa elongata, Ton:) — Wet 

 woods. New England to Michigan, and northward. July -Aug. 



1- t- 1- Dijl'itse: lower palet truncate-obtuse, prominently 7 -nerved ; upper 2-toothed. 



4. G. nervata, Trin. (Fowl-Mkadow Grass, in part.) Branches of 

 the loose panicle capillary, at length drooping, the very numerous small spikelets 

 ovate-ohlong, S-7-tiowcred; leaves rather long. (Poa nervata, Willd. P. stri- 

 ata, Michx. P. parviflbra, Pursh.) — Moist meadows : very common. June. 



— Culm erect, l°-3° high. Spikelets l"-2" long, commonly purplish. 



^. G. pallida, Trin. Branches of the rather simple panicle slender, erect- 

 spreading, rough ; the spikelets usually few, somewhat appressed, oblong-linear, 5-9- 

 flowered (pale, 2'' -3" long) ; lower palet minutely 5-toothed ; the upper lanceolate, 

 conspicuously 2-toothcd ; leaves short, sharp-pointed, pale. (Windsbria pallida 

 & Poa dentiita, 7'orr.) — Shallow water : common, especially northward. July. 



— Culms slender, l°-3° long, ascending from a creeping base. 



6. G. aquatica, Smith. (Reed Meadow-Grass.) Panicle much branched, 

 ample (8'- 1.5' long) ; the numerous branches ascending, spreading with age: spikelets 

 oblong or linear-oblong, .5 - 9-floweretr (usually purpli-h, 2" -3" long) ; lower i ml et 

 entire; leaves large (l°-2° long, J' to ^'wide. — Wet grounds : common north- 

 ward. July. — Culm stout, upright, 3° -5° high. (Eu.) 



* * Spikelets linear (^'-l' long), pale, appressed on the branches of the long and 

 narrow racemose panicle, terete except during anthesis: palets minutely roughish, 

 the upper 2 loot lird : squamuUe unilateral or united : ligule long: culm flattened 

 (1°-.')° high), ascending from a rooting base. (Glyceria, R. Br.) 



7. G. fltlitans, R.Br. Sjjikclets 7- 13-flowered ; lower paid oblong, obtuse, 

 or the scarious tip acutish, entire or obscurely 3 lobed, usually rather longer 



