172 BOTANY OP MICHIGAN 



Panicum virgatum L. Switch grass. Occasional, growing in bunches 

 along low sandy ridges near the Saginaw Bay shore. "Sandy areas and 

 slopes of sand dunes, Akron Township." C. A. Davis. 



Panicum depauperatum Muhl. Starved panicum. Frequent in poor 

 sand}^ ground, especially on low sand ridges along the Saginaw Bay 

 shore. 



Panicum li?idheimeri Nash. Lindheimer's panicum. Frequent in 

 prairie-like ground near the Saginaw Bay shore. 



Panicum tennesseense Ashe. Tennessee panic grass. Often abundant 

 in prairie-like ground near the Saginaw Bay shore. 



Panicum scribnerianum Nash. Scribner's panicum. Noticed by 

 Prof. C. A. Davis in prairie-like ground in northern part of Akron Town- 

 ship. 



Panicum boscii Poir. Porter's panicum. " Common on the sand dunes 

 along the bay and in dry woods throughout. " C. A. Davis. 



Echinochloa crusgalli (L.) Beauv. Barnyard grass. A weed in fields 

 and damp waste places. 



Setaria glauca (L.) Beauv. Foxtail Pigeon grass. A common weed 

 in gardens and cultivated fields. 



Setaria viridis (L.) Beauv. Green foxtail. Bottle grass. A common 

 weed in fields and waste places. 



Cenchrus carolinianus Walt. Sand bur. Bur grass. Becoming very 

 common in light sandy ground along roads. Often a vicious weed in 

 sandy fields and pastures. 



Zizania aquatica L. Wild rice. Water oats. Indian rice. Occasional 

 in shallow water and on mud along the Saginaw Bay shore, being from 

 2 to 3 feet high. Noticed also at Shay's Lake and Murptry's Lake. 

 "Borders of marshy prairies in Akron Township. Also in shallow water 

 in the bay near Fish Point. " C. A. Davis. Not noticed as very abun- 

 dant anywhere. A larger form now known as Zizania palustris L., 

 larger wild rice, often more than 10 feet high is found about Lake St. 

 Clair and Lake Erie. This was perhaps formerly very abundant about 

 Saginaw Bay and may still exist there. 



Leersia virginica WiUd. White grass. Noticed in damp rich woods 

 near Murphy's Lake. Very probably frequent throughout. 



Leersia oryzoides (L.) Sw. Bice cut-grass. Scratch grass. Common 

 in low marshy places, ditches and along slow streams. 



Phalaris caveriensis L. Canary grass. Noticed as occasional in 

 waste places of cities and villages. 



Phalaris arundinacea L. Reed canary grass. Frequent in wet 

 marshy places. 



Phalaris arundinacea picta L. Ribbon grass. Frequently escaping 

 from cultivation to marshy places and persisting. It is very prominent 

 in white patches and can be seen from a long distance. 



