1018] The Grasses of Illinois 395 



This is a northern species, rare in Illinois. It closely resembles P. 



septentrionalis, from which it is most easily separated by its pediceled 



spikelets. It is found in shallow water, or in moist soil along the edges 



of streams and ponds. 



JO DAVIESS CO. Margin of ponds near E. Dubuque, Pepoon 426. stark co. 

 Pond uoitheast of Wady Petra, V. H. Chase 100. 



Panicularia canadensis (Michx.) Kuntze 

 Rattlesnake Grass. (Fig. 241) 



Ghiceria canadensis, Lapham '57, 546, 576; Babcock '73, 97; Patterson '76, 

 50; Flagg '78, 281; Brendel '87, 88; Higley and Eaddin '91, 145; Huett '97, 130. 



Culms erect, 2 to 3 feet tall ; sheaths considerably shorter than the 

 internodes, except at the base of the culm, where they overlap ; blades 

 rough, 6 to 18 inches long, 4 to 8 mm. wide ; panicle 6 to 10 inches long, 

 nearly as broad, the branches very slender, usually drooping; spike- 

 lets 5- to 12-flowered, 5 to 8 mm. long, flattened ; lemmas broad 3 to 4 

 mm. long, faintly nerved. 



This grass is one of the most beautiful of the grasses found in the 



state. It is also a northern species. It is found in wet places. 



ILLINOIS specimens: Northern Illinois, Brendel. fulton co. Without lo- 

 cality, Fepoon. jo daviess co. Without locality, Pepoon. peoria co. Peorin, 

 Brendel. 



Panicularia grandis (Wats.) Nash 

 Reed Meadow Grass (Fig. 242) 



Culms erect, stout, soft and spongy, 3 to 5 feet tall ; sheaths loose, 

 usually smooth ; blades usually smooth beneath, rough above, 8 to 12 

 inches long, 6 to 16 mm. wide ; panicle 8 to 16 inches long, nearly as 

 broad, the branches drooping ; spikelets numerous, 4- to 7-flowered, 4 

 to 6 mm. long; florets purple, the lemmas about 2 mm. long, distinctly 

 7-nerved ; glumes whitish, 1-nerved. 



This species resembles P. nervafa in habit but is a larger, more 

 robust species. The panicle of P. nervaia is much smaller and usually 

 green, while that of P. grandis is very large and nearly always purple ; 

 the leaves of P. grandis are usually much broader. This species is 

 found only in the extreme northern part of the state, while P. nervata 

 is found over the entire state. 



JO DAVIESS CO. Warren, Umbach, July, 1896. 



Panicularia nervata (Willd.) Kuntze 

 Nerved Manna Grass. Fowl Meadow Grass (Fig. 243) 



Glijceria nervata, Lapham '57, 546, 577 (Plate 2, Fig. 2) ; Patterson '76, 50; 

 Flagg '78, 281; Brendel '87, 63; Higley and Eaddin '91, 145; Huett '97, 130; 

 Gates '12, 355; Gleason '12,' 44; SherflP '12, 419; Sherff '13, 595. 



Culms slender, erect, often in large bunches, 1 to 3 feet tall ; sheaths 



iisually smooth, overlapping at the base of the culm, the upper sheaths 



