52 BOTANY OF MICHIGAN 



OXALIDACEAE. Wood Sorrel Family 



O.valis corniculata L. Lady's sorrel. About cities and villages ap- 

 pearing as if introduced. Apparently infrequent. 



GERANIACEAE. Geranium Family 



Geranium maculatum L. Wild cranesbill. In open woods and thickets 

 throughout. Plentiful. 



Geranium robertianum L. Herb robert. In damp shaded ground from 

 Alpena to St. Ignace, Mackinac County. Abundant in spots on Macki- 

 nac Island. 



Geranium bicknellii Britton. Bicknell's cranesbill. Open or partially 

 shaded ground from Arenac County to St. Ignace, Mackinac County. 

 Often very abundant on low recently burnt over ground. 



RUTACEAE. Rue Family 



Zanthoxylum americanum Mill. Northern prickly ash. Near Pin- 

 conning in Bay County and Standish, Arenac County. Plentiful. Also 

 on Bois Blanc Island, Mackinac County. Common about Hillnian, 

 Montmorency County, and Mio, Oscoda County. 



SIMARUBACEAE. Quassia Family 



Ailanthus glandulosa Desf. Ailanthus. Tree of heaven. Cultivated 

 some as an ornamental tree in cities throughout, but apparently not 

 permanently escaping. 



POLYGALACEAE. Milkwort Family 



Polygala pauciflora Willd. Fringed polygala. In dry shaded ground 

 from Bay County to Mackinac Island, Mackinac County. Plentiful. 



Polygala polygama Walt. Pi acemed milkwort. Dry open sandy 

 ground throughout. Frequent. Common on jack pine plains in Mont- 

 morency, Oscoda and Ogemaw counties. 



Polygala senega L. Seneca snakeroot. Dryish open or partially 

 shaded ground in Bay and Alpena counties. Apparently infrequent. 



EUPHORBIACEAE. Spurge Family 



Euphorbia polygonifolia L. Seaside Spurge. Occasional on the sandy 

 beach of Lake Huron from Arenac County to Mackinaw City, Cheboy- 

 gan County. Often in drifting sand. 



Euphorbia maculata L. Milk purslane. Dry open ground about cities 

 and villages, appearing as if introduced. 



Euphorbia helioscopia L. Wart weed. At St. Ignace and on Mackinac 



