"MICHIGAN ACADEMY OF SCIENCE. 171 



Crataegus structilis Ashe. Thorn. — On the bank of St. Clair River south 

 of Sarnia. No. 57 of C. K. Dodge. 



Crataegus flammea Sarg. Thorn. — Bank of St. Clair River south of 

 Sarnia. No. 121 of C. K. Dodge. 



Crataegus prinoides Sarg. Thorn. — Bank of St. Clair River south of 

 Sarnia. Tj-pe tree No. 58 of C. K. Dodge. 



Crataegus gemmosa Sarg. Thorn. — Bank of St. Clair River south of 

 Sarnia. No. 98 of C. K. Dodge. Fruit red, small, beautiful, and palatable. 

 A beautiful thorn in bloom or fruit. 



Crataegus pisifera Sarg. Thorn. — Bank of St. Clair River south of Sar- 

 nia. No. 90 of C. K. Dodge. 



Fragaria virginiana Duchesne. Common Strawberry. — Common in dry 

 ground, fields, and open woods. 



Fragaria vesca americana Porter. American Wood Strawberry. — Common 

 in damp meadows, damp open woods and thickets. 



Waldsteinia fragarioides (Michx.) Trattinick. Barren Strawberry. — 

 Occasional in thickets and on shaded hillsides. Abundant along the banks of 

 Aux Sables River. 



Potentilla arguta Pursh. Tall Cinquefoil. — Near Port Franks in dry 

 open ground. Apparently infrequent. Newton Tripp. 



Potentilla monspeliensis L. Rough Cinquefoil. — Common in fields and 

 open ground. 



Potentilla argentea L. Silvery Cinquefoil. — Common in dry and sandy 

 ground. 



Potentilla intermedia L. Downy Cinquefoil. — Occasional on road sides 

 and in waste places near Forest. Newton Tripp. 



Potentilla recta L. Rough-fruited Cinquefoil. — Occasional near Forest. 

 On roadsides and in fields. Newton Tripp. 



Potentilla palustris (L.) Scop. Marsh Five-finger. — Frequent in wet and 

 marshy places. Often abmidant. 



Potentilla fruticosa L. Shrubby Cinquefoil. — Frequent in wet or dry 

 open ground. Very abundant at Port Franks where it is called Sage Brush. 



Potentilla anserina L. Silver Weed. — Abundant near the lake and St. 

 Clair River shores. 



Potentilla canadensis L. Common Cinquefoil. — Frequent in dry and 

 sandy ground. Much smaller than the following. 



Potentilla canadensis simplex (Michx.) (T. and G.) Decumbent Five- 

 finger. — Frequent and often abundant in sandy ground. 



Potentilla reptans L. Trailing Cinquefoil. — In grassy places about Forest. 

 Frequent. Newton Tripp. 



Geum canadense Jacq. White Avens. — Common in damp open woods and 

 thickets. 



Geum virginianum L. Rough Avens. — Frequent in low ground and on 

 borders of woods. 



Geum strictum Ait. Yellow Avens. — Common in moist meadows and 

 thickets. 



Geum vernum (Raf.) T. and S. Spring Avens. — Noticed by Prof. John 

 Macoun near Wallaceburg, Kent Co. Also noticed on Walpole Island in 

 1910. 



Geum rivale L. Water Avens. — Frequent in wet meadows and rich open 

 woods. 



Rubus idaeus aculeatissimus (C. A. Mey.) Regal and Tiling. Wild Red 

 Raspberry. — Common in dry ground and in thickets. 



