212 



GRAMINEAE. 



4. Panicularia elongata (Torr. ) Kuntze. 

 Manna-grass. (Fig. 487.) 



Poa elongata Torr. Fl. U. S. i: 112. 1824. 



Glyceria elongata Trin. Bull. Acad. Sci. St. Petersb. i: 



68. 1836. 

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



Culms 2-3 tall, erect, simple, slender, smooth 

 and glabrous. Sheaths often shorter than the in- 

 ternodes; ligule W long; leaves lax, 6'- 12' long, 

 i^ // -3 // wide, long-acuminate, smooth beneath, 

 rough above; panicle elongated, contracted, nar- 

 row, usually nodding at the summit, 6 / -i2 / in 

 length, the branches erect or appressed, i / -2^ / 

 long; spikelets 3-4-flowered, i%"-2" long; empty 

 scales unequal, acute, i-nerved; flowering scales 

 narrow, about \" long, obtuse or acutish, distinctly 

 7-nerved. 



In wet woods, Newfoundland to Quebec and Minne- 

 sota, south to North Carolina and Kentucky. Ascends 

 to 4000 ft. in the Adirondacks. Aug. -Sept. 



5. Panicularia nervata (Willd.) Kuntze. Nerved Manna-grass. (Fig. 488.) 



Poa nervata Willd. Sp. PI. i: 389. 1798. 



Glyceria nervata Trin. Mem. Acad. St. Petersb. (VI.) 



1:365. 1831. 

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



Culms i-3 tall, erect, slender, simple, smooth 

 and glabrous. Sheaths often shorter than the in- 

 ternodes, usually more or less rough; ligule y z " 

 long, truncate; leaves 6 / -i2 / long, 2 // -5 // wide, 

 acute, smooth beneath, rough above; panicle 3 '-8' in 

 length, open, the branches filiform, spreading, as- 

 cending or often drooping, rarely erect, 2 / ~5 / long; 

 spikelets 3-7-flowered, i // -i^ // long; empty scales 

 obtuse, i-nerved; flowering scales about *" long, 

 obtuse or rounded, with 7 sharp distinct nerves and 

 evident furrows between. 



In wet places, Newfoundland to British Columbia, 

 south to Florida and Mexico. Ascends to 4000 ft. in 

 Virginia. Panicle often purple. June-Sept. 



6. Panicularia Americana (Torr.) MacM. Reed Meadow-grass. Tall 

 Manna-grass. (Fig. 489.) 



Poa aquatica var. Americana Torr. Fl. U. S. i: 108. 



1824. 

 Glyceria grandis S. Wats, in A. Gray, Man. Ed. 6, 



667. 1890. 

 Panicularia Americana MacMillan, Met. Minn. 81. 



1892. 



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

 and glabrous. Sheaths loose, smooth, or some- 

 times rough; ligule i // -2 // long, truncate; leaves 

 7 / -i long or more, 3"-8" wide, usually smooth 

 beneath, rough above; panicle $'-15' in length, 

 its branches spreading, ascending or rarely erect, 

 4 / -8 / long; spikelets 4-7-flowered, 2 // ~3 // long; 

 empty scales acute, i -nerved; flowering scales about 

 i" long, obtuse or rounded at the apex, sharply 

 and distinctly 7-nerved, the furrows between the 

 nerves evident. 



In wet soil, New Brunswick to Alaska, south to Ten- 

 nessee, Nebraska, Colorado and Nevada. Ascends to 

 2100 ft. in Pennsylvania. June-Aug. 





