GENUS 96. 



GRASS FAMILY. 



265 



6. Panicularia grandis (S. Wats.) Nash. Reed 

 Meadow-grass. Tall Manna-grass. Fig. 637. 



Poa aquatica var. americana Torr. Fl. U. S. I : 108. 1824. 

 Glycerin grandis S. Wats, in A. Gray, Man. Ed. 6, 667. 



1890. 

 P. americana MacMillan, Met. Minn. 81. 1892. 



Culms 3-5 tall, erect, stout, simple, smooth and 

 glabrous. Sheaths loose, smooth, or sometimes rough ; 

 ligule i "-2" long, truncate; blades 7'-i long or more, 

 3"-8" wide, usually smooth beneath, rough above ; 

 panicle 8'-i5' in length, its branches spreading, as- 

 cending or rarely erect, 4'-8' long ; spikelets 4-7-flow- 

 ered, 2"-$" long; empty scales acute, i-nerved; flow- 

 ering scales about i" long, obtuse or rounded at the 

 apex, sharply and distinctly 7-nerved, the furrows 

 between the nerves evident. 



In wet soil, Nova Scotia to Alaska, south to Pennsyl- 

 vania, Colorado and Nevada. Ascends to 2100 ft. in 

 Pennsylvania. White Spear-grass, Water Meadow-grass. 

 June-Aug. 



7. Panicularia pallida (Torr.) Kuntze. Pale Manna-grass. Fig. 638. 



Windsor ia pallida Torr. Cat. N. Y. 91. 1819. 



Glyceria pallida Trin. Bull. Acad. Sci. St. Petersb. i : 68. 



1836. 



Panicularia pallida Kuntze, Rev. Gen. PI. 783. 1891. 

 G. pallida Fernaldii Hitchc. Rhodora 8: 211. 1906. 



Pale green, culms i-3 long, assurgent, simple, 

 smooth and glabrous. Sheaths loose, shorter than 

 the internodes ; ligule 2"-3" long, acute ; blades 2'-6' 

 long, i"-2" wide, smooth beneath, rough above; 

 panicle ii'-7' in length, the branches spreading, as- 

 cending or rarely erect, often flexuous, i'-2' long; 

 spikelets 4-8-flowered, 2%"-$" long; empty scales 

 unequal, the first l-nerved, obtuse, shorter than the 

 3-nerved and truncate second; flowering scales ii"- 

 \\" long, truncate and denticulate at the apex, 

 sharply and distinctly 7-nerved, with plain furrows 

 between the nerves. 



In shallow water, Nova Scotia and New Brunswick to 

 Minnesota, south to North Carolina and Tennessee. 

 Ascends to 2000 ft. in Pennsylvania. July-Aug. 



8. Panicularia septentrionalis (Hitchc.) Bicknell. American Flote-grass or 

 Floating Manna-grass. Fig. 639. 



Glyceria septentrionalis Hitchc. Rhodora 8: 211. 1906. 

 Panicularia septentrionalis Bicknell, Bull. Torrey Club 35 : 

 196. 1908. 



Culms 2-5 long, flattened, erect or decumbent, 

 usually stout, simple, smooth and glabrous, often root- 

 ing from the lower nodes. Sheaths loose, generally 

 overlapping, smooth or rough; ligule 2"-3" long; blades 

 5'-! long or more, 2"-6" wide, scabrous, often float- 

 ing; panicle p'-ii long, the branches, at least the 

 lower ones, at first appressed, later ascending, and 

 3'-6' long; spikelets linear, 7-i3-flowered, 4"-i2" long; 

 empty scales unequal, i -nerved, the lower acute or ob- I 

 tuse, the upper obtuse or truncate; flowering scales ' 

 ii"-2i" long, oblong, rounded or truncate at the erose 

 apex, more or less scabrous, sharply 7-nerved. 



In wet places or in water, Vermont and Quebec to. British 

 Columbia, south to North Carolina, Louisiana and Texas. 

 Previously confused with P. fluitans, July-Sept. 



