200 BOTANY OF MICHIGAN 



OXALIDACEAE. Wood Sorrel Family 



Oxalis stricta L. Upright yellow wood sorrel. Often along railroads, 

 in depot grounds and waste places. 



Oxalis corniculata L. Lady's sorrel. Dry or damp open ground. 

 Often a weed in gardens and waste places. 



GERANIACEAE. Geranium Family 



Geranium maculatum L. Wild crane's-bill. " Burned over sandy 

 land in the Cass River valley, Vassar Township. ' C. A. Davis. 



Geranium bicknellii Britton. Bicknell's crane's-bill. Open woods 

 and especially in recent clearings and burned over ground. Frequent. 



RUTACEAE. Rue Family 



Zanthoxylum americanum Mill. Northern prickly ash. Common in 

 damp woods and thickets. 



SIMARUBACEAE. Quassia Family 



Ailanthus glandulosa Desf. Tree of heaven. Planted occasionally as 

 an ornamental tree and often escaping. 



POLYGALACEAE. Milkwort Family 



Poly gala pauciflora Willd. Fringed poh T gala. In dry sterile shaded 

 ground. Frequent. 



Polygala polygama Walt. Racemed milkwort. " Low sand ridges on 

 the prairies and in Indianfields Township." C. A. Davis. 



Polygala senega L. Seneca snakeroot. Abundant on an " island ' ; 

 near Bay Park. "Low sandy areas on the prairies of Akron and Wisner 

 townships. " C. A. Davis. 



EUPHORBIACEAE. Spurge Family 



Euphorbia polygonifolia L. Seaside spurge. Occasional in sand along 

 the beach of Saginaw Bay. 



Euphorbia preslii Guss. Upright spotted spurge. Dry open ground. 

 Noticed particularly about depot grounds in cities and villages. 



Euphorbia maculata L. Milk purslane. On roadsides in villages and 

 along railroads. Common. 



Euphorbia corollata L. Flowering spurge. Occasional on low sand 

 ridges near the shore of Saginaw Bay, and on dry hills about the small 

 la,kes. 



Euphorbia cyparissias L. Cypress spurge. Frequent in cemeteries 

 and on sandy dry ground along roads. 



