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| Panicum scribnerianum leibergii Scribn. 
| South Dakota: Brookings (Wilcox 16). 
| Low, moist prairies and bottom lands, not yet found ontside of the Sioux Valley. 
Distinguished from the species by its larger size, more conspieuously tuberculate- 
Lairy leaves and sheaths, and contracted panicle. It has much of the aspect of 
P. xanthophysum Gray, but that species has smooth leaves and the lower empty 
glume is longer. 
Panicum virgatum L. 
North Dakota: Dunseith (Brannon iri Minot, Church’s Ferry, Minnewaukon, Dick- 
inson, Grand Forks, Fargo, Oa 
South Dakota: Frankfort (Griffiths 58), Huron (Griffiths 22), Aberdeen (Griffiths 82, 
132), Brookings (Wileox 15), Aurora County (Wileox 54), along Firesteel Creek, 
Watertown, Sioux Falls, White River (Wallace 3, 4, 5). Generally on moist 
prairies and bottom lands, but occasionally found in driersoils. The last one of 
Mr. Wallace's specimens is a very much dwarfed form. 
| Panicum wilcoxianum Vasey. 
South Dakota: Brookings. 
ry soil, rare. It probably oceurs elsewhere in the State, being confused with P. 
scribnerianum and P. depauperatum, between which it is intermediate 
Cheetochloa glauca (L.) Seribn. in Bull. 4, Div. Agros., p. 39 (1897). 
South Dakota: Frankfort (Griffiths 54), Brookings, Sioux Falls, Iroquois, Aurora 
County. 
Cheetochloa italica xm ) Seribn. T. c. 
Cultivated r t 1 t 1 1 of both States, 
and often occurring as an escape in old fields and waste places. 
Cheetochloa italica germanica (Mill.) Seribn. (Panicum germanicum Mill.) 
=. sigh Webster's Chapel (Brannon 55), Chureh's Ferry, Langdon, Grand 
argo. 
South Palas paria Aberdeen, Watertown, Sioux Falls. Cultivated, and occa- 
sionally escaped. 
Cheetochloa viridis (L.) Seribn. l. e 
North parate Devil's Lake (Brannon 50), Minot, Bottineau, Fargo, Grand Forks, 
Dickinson, Oakes 
8 Dakota: 8 (Griffiths 123), Brookings, Sioux Falls, Iroquois, Aurora 
In a soll. of cultivated fields. 
Cenchrus tribuloides L. 
South Dakota: Pierre (Griffiths 30, xo Chamberlain, Vermilion, Elk Point. 
Sandy soil in fields and waste place 
ORYZEJE. 
Zizania aquatica L 
qr pompes xe ones 8), Tacoma Park (Griffiths 118), Brookings (Wilcox 
33, 34), Sioux 
Bdgn o of streams A uon. 
Homalocenchrus oryzoides (L.) Poll. 
South Dakota: Frankfort (Griffiths 49), Huron (Griffiths 10), Redfield (Griffiths 79), 
; Brookings, Davison County by 28), Bear Creek (Wallace 64). 
Wet pente along margins of stream: 
