MICHIGAN ACADEMY OF SCIENCE. 143 



Panicum lindheimeri Nash. Lindheimer's Panicum.-f-In sandy open 

 ground near Sarnia, and on Squirrel Island. 



Panicum huachucae Ashe. Woolly Panicum. — In prairie-like ground on 

 Walpole Island. 



Panicum huachusae silvicola Hitch, and Chase. Sylvan Panicum. — 

 Borders of woods on prairie-like ground on the delta islands of St. Clair 

 River. 



Panicum implicatum Scribn. Hairy-panicled Panicum. — In damp ground 

 near Sarnia and on the Delta Islands. 



Panicum meridionale Ashe. Matting Panic-grass. — In sandy ground near 

 Sarnia. 



Panicum praecocius Hitchc. and Chase. Early-branching Panic-grass. — 

 Occasional in open prairie-like ground on the delta islands of St. Clair River. 



Panicum villosissimum Nash. Atlantic Panicum. — ^In dry, poor ground on 

 Squirrel Island. 



Panicum tsugetorum Nash. Hemlock Panicum. — Occasional in sandy 

 ground near Sarnia. 



Panicum sphaerocarpon Ell. Round-fruited Panicum. — Occasional on the 

 delta islands of St. Clair River. 



Panicum commutatum Schultes. Variable Panicum. — Frequent on 

 borders of woods on the delta islands of St. Clair River. 



Panicum scribnerianum Nash. Scribner's Panicum. — Frequent in dry 

 and prairie-like ground on the delta islands of St. Clair River, and occasional 

 in other places. 



Panicum leibergii (Vasey) Scribn. Leiberg's Panicum. — Frequent in 

 prairie-like ground on the delta islands of St. Clair River. 



Panicum xanthophysum Gray. Slender Panicum. — Occasional in dry 

 open woods near Port Franks. 



Panicum clandestinum L. Hispid Panicum. — Occasional in wet grounds. 



Panicum latifolium L. Large-fruited Panicum. — Frequent in dry ground. 

 Al)undant on St. Ann's Island. 



Echinochloa crusgalli (L.) Beauv. Barnyard Grass. — Very common as a 

 weed in gardens and moist waste places. 



Echinochloa walteri (Pursh) Nash. Salt-marsh Cockspur-Grass.— Oc- 

 casional in ditches and damp places. 



Setaria glauca (L.) Beauv. Foxtail. Pigeon Grass.^ — -Very common as a 

 weed in cultivated and waste grounds. 



Setaria viridis (L.) Beauv. Green Foxtail. Bottle Grass. — Very common 

 as a weed in cultivated grounds and waste places. 



Setaria italica (L.) Beauv. Italian Millet. — Occasional^ escaping from 

 cultivation into waste places. 



Cenchrus carolinianus Walt. Sandbur. Bur Grass. — Very common in 

 dry and sandy ground. Fast invading dry sand}^ fields and pastures. 



Zizania palustris L. Water Rice. Indian Rice. Water Oats. — 

 Abundant in Sarnia Bay, in shallow water along St. Clair River, its mouths 

 and in wet marshes about Lake St. Clair, often over 8 feet high. 



Zizania aquatica L. Smaller Water Rice. Not yet noticed for certain in 

 Lambton Co., but found near Port Huron, St. Clair Co., Mich., along Black 

 River and in creeks. 



Leersia virginica Willd. White Grass. — Frequent in rich damp woods and 

 thickets. 



Leersia oryzoides (L.) Sw. Rice Cut-Grass. Scratch Grass. — Common in 

 swamps, ditches, and on borders of slow streams. 



