56 BOTANY OF MICHIGAN 



CACTACEAE. Cactus Family 



Opantia rafinesquii Engelm. Western prickly pear. Reported west 

 of Alpena, Alpena County, in open sandy ground. Not seen by writer. 



THYMELAEACEAE. Mezereum Family 



Dirca pahtstris L. Moose-wood. Feather-wood. Rich open woods. 

 Frequent. Noticed in particular near Presque Isle Bay in Presque Isle 

 County. 



ELAEAGNACEAE. Oleaster Family 



Shepherdia canadensis (L.) Nutt. Canadian buffalo-berry. In dry 

 open or partially shaded ground. Frequent throughout. 



« 



ONAGRACEAE. Evening Primrose Family 



Ludvigia polycarpa Short & Peter. Many-fruited ludvigia. Wet open 

 places in Bay County. Plentiful. 



Ludvigia palustris Walt. Water purslane. Ditches and very wet 

 places throughout. Often abundant. 



Epilobium angustifolium L. Great willow-herb. Fireweed. In dryish 

 open or shaded ground, being very abundant throughout on burnt over 

 land. 



Epilobium molle Torr. DoAvny willow-herb. In marshy or boggy 

 ground from Bay County to Mackinaw City, Cheboygan Coiuny. Fre- 

 quent. 



Epilobium densum Raf. Linear-leaved willow-herb. Low marsh}- 

 open ground. Frequent throughout. 



Epilobium adenocaulon Haussk. Northern willow-herb. In damp 

 open ground from Bay County to St. Ignace. Plentiful. 



Oenothera biennis L. Common evening primrose. In dry open or 

 shaded ground throughout. Often abundant on and near the sandy 

 beach of Lake Huron. 



Circaea lutetiana L. Enchanter's nightshade. Beech-maple woods 

 throughout. Frequent. Often plentiful. 



Circaea xdpina L. Smaller enchanter's nightshade. In damp woods 

 throughout. Common. Often abundant. 



HALORAGIDACEAE. Water Milfoil Family 



Myriophyllum spicatum L. Spiked water milfoil. In shallow water 

 along slow streams, on margins of ponds, in old ditches and coves. Fre- 

 quent throughout. 



Myriophyllum heterophyllum Michx. Various-leaved water-milfoil. 

 In shalloAv water of ponds, old ditches, and slow streams. Frequent 

 throughout. 



