168 GLYCERIA. 



times obscurely tootlied) at the blunt or rarely acute 

 summit, glabrous, 5 to 7-nerved, the nerves parallel 

 and separate. Stamens 3 or in the first section 

 commonly 2. Stigmas plumose, mostly compound. 

 Ovary smooth. Grain oblong, free. Perennial, smooth 

 marsh-grasses, mostly with creeping bases or root- 

 stocks ; the spikelets panicled. 



Name from glykeros, sweet, in allusion to the taste 

 of the grain. 



1. G. Canadensis (Rattlesnake Grass). Bogs and 

 wet places. Comimn from Pennsylvania, northward. 

 Flowers in July. 



2. G. Obtusa (The obtuse Spear Grass). An aquatic 

 grass. 



3. G. Elongata (Long Panicled Manna Grass). Wet 

 woods and swamps, from New England to Michigan, 

 and northward. 



4. G.Nervata (Meadow Spear Grass, Nerved Manna 

 Grass). Fowl meadow of many farmers in Eastern 

 States. See page 70. 



5. G, Pallida (The Pale Manna Grass). Grows 

 mostly in shallow water. No value for cultivation. 



6. G. Aquatic (The water Spear Grass, or Reed 

 Meadow Grass. See page 72. 



7. G. Fluitans (The Floating meadow Grass, or 

 Common Manna Grass. See page 72. 



8. Glyceria Acutifolia (Pointed Spear Grass). Re- 

 sembles F. Fluitans, but with smaller leaves, and 



