q oe Glyceria R. br. ; aceite WNANNA=ZLASs. 
Aquatic or marsh grasses with flat blades and Open or contracted panicles. 
i Spixelets several flowared, the rachilla disarticulating above the Slumes and 
“ 5 
between the florets; slumes short, obtuse or acute, sometimes scarious, 4 
: I-nerved; lames obtuse, 4=7 nerved, she nerves prominent, parallel.(Panicularia Heister} 
4 Lemmas 5 mme long, scabrous between the nerves il. G fluitans 
2 Lemmas 4 mm. long, glabrous between the somewhat 
scgbrous nerves 2e G. borealis 
o Spikelets ovate or oblong; panicles broad, the branches 
4 Spreading or drooping 
Z Lemmas 5 nerved de G. pauciflora 
rd Lemmas 7 nerved 
A First glume 0.5-1 mn. long; sheaths scabrous tite 
6G Lemmas 2 mm. long; blades not over 6 mn. wide 4. G. nerverta 
‘ q & Lemmas 2.5 mn. long, blades as much as 10 mm. wide De Ge elata 
4 First glume 2 mm. long; sheaths smooth 6. G. grandis ; 
F 
4 
4 F 
1. G fluitans R. Br. —»VWater \iannagrass. ——>Culns usually succulent, erect : 
from a decumbent base, rooting at the lower nodes, 60-120 om. tall; sheaths 
; ‘ : ‘ 4 
keeled, smooth or occasionally scaberulous, the lower ones often inflated; ’ 
ligules thin and papery, as much as 10 mine long; blades rathe firm, erect, 4 
scabrous or nearly smooth, 10-25 on. long, 3-7 mn. wide, the apex usually 
boatshaped; panicles nerrow, 20 to as much as 45 om. long, she branches erect 
or ascending; spikelets 5-9 flowered, the florets not crowded; glumes lanceolate 
or ovete-lanceolate, l-nerved, the first 2-3 mme the second 4-5 mm. long; 
lemmas obtuse, about 5 mn. long, strongly T-nerved, scabrous on and betveen the 
nerves. 
/ 
Shallow water along lakes and creel bottomse 
y 
3 
c 7 laea) 
——? Lake Coeur d'Alons, Uienecek 215% Santianne Creek Bottoms ,-betbers 1038; 
