MANUAL OF THE GRASSES OF THE UNITED STATES 



89 



10. Glyceria obtusa (Muhl.) Trin. (Fig. 139.) Culms erect, often 

 decumbent at base, 50 to 100 cm tall, rather firm; blades elongate 

 erect, mostly smooth, flat or folded, 2 to 6 mm wide; panicle erect 



oblong or narrowly elliptic, dense, 5 to 15 cm long, the 



branches ascending or appressed; spikelets mostly 4- to 



7-flowered, 4 to 6 mm long, 



green or tawny, the rachilla 



joints very short; glumes broad, 



scarious, 1.5 and 2 mm long; 



lemmas firm, faintly nerved, 



smooth, 3 to 4 mm long, obtuse, 



the scarious tip narrow, often 



revolute. 9J. (Panicularia obtusa 



Kuntze.) Bogs and marshy 



places, Nova Scotia to North 



Carolina, near the coast (fig. 



140). 

 11. Glyceria melicaria 



(Michx.) F. T. Hubb. (Fig. 



141.) Culms slender, solitary 



or few, 60 to 100 cm tall; blades 



elongate, scaberulous, 2 to 5 mm 



wide; panicle narrow but rather 



loose, nodding, 15 to 25 cm long, 



the branches erect, rather dis- 



tant; spikelets 3- or 4-flowered, 

 FIGURE IBS. about 4 mm long, green; glumes 



ab Ut L5 and 2 mm lon g> acu <- 



k* 1 ' l emmas fi rm > 2 to 2.5 mm 

 long, acutish, smooth, the nerves 

 rather faint. 91 (G. torreyana 



Hitchc.; Panicularia torreyana Merr.; P. 



melicaria Hitchc.) Swamps and wet woods, 



New Brunswick to Ohio, south to the 



mountains of North Carolina (fig. 142). 

 12. Glyceria canadensis (Michx.) Trin. 



RATTLESNAKE MANNAGRASS. (Fig. 143.) 



Culms erect, solitary or few in a tuft, 60 to 



150 cm tall; blades scabrous, 3 to 7 mm 



wide; panicle open, 15 to 20 cm long, nearly as wide, the branches 



rather distant, drooping, naked below; spikelets ovate or oblong, 5- to 

 10-flowered, 5 to 6 mm long, the florets crowded, 

 spreading; glumes about 2 and 3 mm long; 

 lemmas 3 to 4 mm long, the 7 nerves obscured 

 in the firm tissue of the lemma; palea bowed 

 out on the keels, the floret somewhat tumid. 

 91 (Panicularia canadensis Kuntze.) Bogs 

 and wet places, Newfoundland to Minnesota, 

 south to Maryland and Illinois (fig. 144). 

 GLYCERIA CANADENSIS var. L^XA (Scribn.) 



Hitchc. On the average taller, with looser panicles of somewhat 



smaller 3- to 5-flowered spikelets. 91 (Panicularia laxa Scribn.) 



Wet places, Nova Scotia to New York, Maryland, and West Virginia,- 



Michigan. 



PanSe, l 



(Hitcfccock 



3059, c 



FIGURE 139. Glyceria obtusa. Pan 

 icle, X 1; 2 views of floret, X 10. 

 (Miller, N.Y.) 



FIGURE 140. Distribution of 

 Glyceria obtusa. 



