152 BOTANY OF MICHIGAN 



Rubus allegheniensis Porter. Tail blackberry. Dry open or slightly 

 shaded ground throughout. Frequent. 



Rubus nigricans Rydb. Bristly blackberry. About dead tamaracks 

 in margin of tamarack-black spruce swamp near Emerson. Plentiful 

 at this place. 



Rubus hispidus L. Hispid blackberry. Damp open or slightly shaded 

 ground throughout. Frequent. 



Rubus villosus Ait. Dewberry. Dry sandy ground, often on shaded 

 sand dunes throughout. Frequent. 



Agrimonia- gryposepala Wallr. Tall hairy agrimony. Dryish open or 

 slightly shaded ground throughout. Frequent. 



Rosa acicularis Lincll. Prickly rose. Dryish open or slightly shaded 

 ground, throughout. Not common. 



Rosa blanda Ait. Meadow rose. Open sandy ground and on sandy 

 beaches. Plentiful. 



Rosa rubiginosa L. Sweetbriar. In villages and along roads. No- 

 ticed in particular on the road from Sault Ste. Marie to Detour. On 

 Mackinac Island, Mackinac County, and in Chippewa County, Michi- 

 gan, this shrub is being killed to the ground by the sting of the gall fly, 

 Rhodistes rosae. The shaggy galls formed are often called "rose apples ". 



Rosa Carolina L. Swamp rose. Borders of swamps and streams. 

 Frequent. Noticed in particular along Shelldrake River south of Ver- 

 milion. 



Prunus virginiana L. Choke cherry. Open ground throughout. 

 Common. 



Prunus pennsylvanica L.f. Wild red cherry. Common throughout. 

 Abundant on lumbered over and burned over sand ridges, and in sandy 

 ground of recent clearings. 



Prunus pumila L. Sand cherry. Common throughout. Abundant 

 in sandy ground near Lake Superior shore. 



Prunus nigra Ait. Canada plum. Abundant along streams near 

 Pickford, and common about Gatesville. 



LEGUMINOSAE. Pulse Family 



Trifolium pratense L. Red clover. Frequent everywhere as an escape. 



Trifolium repens L. White clover. Frequent as a weed everywhere, 

 and abundant in clearings. 



Trifolium hybridum L. Alsike clover. Frequent along roads as an 

 escape. 



Melilotus alba Desr. White sweet clover. Occasional in and about 

 Sault Ste. Marie. 



Lathyrus maritimus (L.) Bigel. Beach pea. Along the sandy beach of 

 Lake Superior. Abundant in spots, acting as an efficient sand binder. 



