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. 1 : 108. 1824. 

 Glyceria 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 7-1 ° long or more, 

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

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

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

 ered, 2"-3" long; empty scales acute, i-nerved; flow- 

 ering scales about 1" 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. 



Windsoria pallida Torr. Cat. N. Y. 91. 1819. 



Glyceria pallida Trin. Bull. Acad. Sci. St. Petersb. 1 : 68. 



1836. 

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

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



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

 smooth and glabrous. Sheaths loose, shorter than 

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

 long, 1 "-2" wide, smooth beneath, rough above; 

 panicle iV-j' in length, the branches spreading, as- 

 cending or rarely erect, often flexuous, 1/-2' long; 

 spikelets 4-8-flowered, zV'-^i" long; empty scales 

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

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

 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°-s° 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"-^' long; blades 

 S'-i° long or more, 2"-6" wide, scabrous, often float- 

 ing; panicle 9-1 4° long, the branches, at least the 

 lower ones, at first appressed, later ascending, and 

 3'-6' long; spikelets linear, 7-13-flowered, 4"-i2" long; 

 empty scales unequal, 1 -nerved, the lower acute or ob- 

 tuse, the upper obtuse or truncate; flowering scales 

 ij"-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. 



