22 BOTANY OF MICHIGAN 



frequent on the jack pine plains of Presque Isle, Montmorency, Oscoda 

 and Ogemaw counties. 



Digitaria humifusa Pers. Small crab-grass. Cultivated and waste 

 grounds from Bay County to Mackinaw City, Cheboygan County. 

 Frequent. 



Digitaria sanguinalis (L.) Scop. Crab-grass. A weed about fishery 

 and farm buildings, in fields and gardens. Plentiful throughout. 



Panicum capillare L. Old-witch grass. A common weed about cities, 

 villages, in fields, and gardens. Plentiful throughout. 



Panicum flexile (Gattinger) Scribn. Wiry witch-grass. Damp marshy 

 open ground from Bay County to Bois Blanc Island, Mackinac County. 

 Frequent. 



Panicum depauperatum Muhl. Starved panicum. In dry open 

 ground. Frequent throughout. 



Panicum boreale Nash. Northern panicum. In damp grassy open 

 ground near Linwood, Bay County. Plentiful at this place. 



Panicum lindheimeri Nash. Lindheimer's panic-grass. Dry open 

 ground on Bois Blanc Island. Apparently infrequent. 



Panicum tsugetorum Nash. Hemlock panicum. In sand}' ground near 

 Au Gres, Arenac County. Plentiful. 



Echinochloa crusgalli (L.) Beauv. Barnyard grass. In and near cul- 

 tivated grounds and in damp places. Plentiful throughout. 



Setaria glauca (L.) Beauv. Foxtail. A weed about dwellings and in 

 cultivated grounds. Common throughout. 



Setaria viridis (L.) Beauv. Green foxtail. A weed in gardens and 

 other cultivated grounds. Frequent throughout. 



Cenchrus coroliniamts Walt. Sandbur. Bur grass. Sandy roadsides, 

 Sand} 7 pastures and fields, and in waste places of cities and villages. 

 Frequent throughout. 



Zizania palustris L. Indian rice. Wild rice. Occasional in shallow 

 water as if introduced. 



Zizania aquatica L. Water oats. In mud and shallow water. In- 

 frequent. 



Leersia oryzoides (L.) Sw. Rice cut-grass. Scratch grass. Ditches, 

 low banks of small streams and low places. Frequent throughout. 



Phalaris arundinacea L. Reed canary grass. In wet marsh}' open 

 places. Frequent throughout. 



Phalaris arundinacea picla L. Ribbon grass. Noticed in many wet 

 marshy places as an apparently permanent escape from cultivation. 



Hierochloe odoroia (L.) Wahlenb. Vanilla grass. Abundant in spots 

 on the east side of Mackinac Island. Probably frequent throughout 

 but overlooked. 



Milium effusum L. Millet grass. Rich shaded ground especially in 

 rich woods. Frequent throughout. 



