264 



GRAMINEAE. 



Vol. I. 



3. Panicularia obtusa (Muhl.) Kuntze. Blunt 

 Manna-grass. Fig. 634. 



Poa obtusa Muhl. Gram. 147. 181 7. 



Glyceria obtusa Trin. Mem. Acad. St. Petersb. (VI.) 1 : 366. 



1831. 

 Panicularia obtusa Kuntze, Rev. Gen. Pi. 783. 1891. 



Culms i°-3° tall, erect, simple, smooth and glabrous. 

 Sheaths sometimes rough, strongly striate, the lower 

 overlapping; ligule very short; blades 6'-is' long, 2"-4" 

 wide, usually stiff, erect or ascending, smooth beneath, 

 more or less scabrous above ; panicle 3'-8' in length, 

 contracted, dense, the branches erect; spikelets 3-7-flow- 

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

 flowering scales about ii" long, broad, obtuse, ob- 

 scurely 7-nerved. 



In swamps, Nova Scotia and New Brunswick to New 

 York and central Pennsylvania, south to Maryland and 

 North Carolina (according to Kearney). Ascends to 2300 

 ft. in the Catskill Mountains. July-Aug. 



4. Panicularia Torreyana (Spreng.) Merrill. Long Manna-grass. Fig. 635. 



Poa elongata Torr. Fl. U. S. i : 112. 1824. Not Willd. 

 1809. 



P. Torreyana Spreng. Neue Entdeck. 2: 104. 1821. 



Glyceria elongata Trin. Bull. Acad. Sci. St. Petersb. 1 : 

 68. 1836. 



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



P. Torreyana Merrill, Rhodora 4: 146. 1902. 



Glyceria Torreyana Hitchc. Rhodora 8: 211. 1906. 



Culms 2°-3° tall, erect. Sheaths often shorter 

 than the internodes; blades lax, 6'-i2' long, ii"-3" 

 wide, long-acuminate, smooth beneath, rough above; 

 panicle elongated, contracted, narrow, usually nod- 

 ding at the summit, 6'-i2' in length, the branches 

 erect or appressed, l'-2i' long ; spikelets 3-4-flowered, 

 ii"-2" long; empty scales unequal, acute, i-nerved; 

 flowering scales narrow, about 1" long, obtuse or 

 acutish, 7-nerved. 



In wet woods, Maine and Quebec to Minnesota, south 

 to North Carolina and Kentucky. Ascends to 4000 ft. 

 in the Adirondacks. Aug.-Sept. 



5. Panicularia nervata (Willd.) Kuntze. Meadow-grass. 



Fig. 636. 



Poa nervata Willd. Sp. PI. 1 : 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 internodes, 

 usually more or less rough; ligule i" long, truncate; 

 blades 6'-i2' long, 2"-$" wide, acute, smooth beneath, 

 rough above; panicle 3'S' in length, open, the 

 branches filiform, spreading, ascending or often 

 drooping, rarely erect, 2-5' long; spikelets 3-7-flow- 

 ered, i"-i4" long; empty scales obtuse, i-nerved; 

 flowering scales about I" long, obtuse or rounded, 

 with 7 sharp distinct nerves and evident furrows be- 

 tween. 



In wet places, Newfoundland to British Columbia, south 

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

 Panicle often purple. Meadow Spear-grass, Fowl-grass. 

 June-Sept. 



Nerved Manna-grass. 



