196 BOTANY OF MICHIGAN 



Pyrus melanocarpa (Michx.) WiUd. Black chokeberry. Abundant 

 in spots in low open ground, especially near the small lakes. 



Pyrus americana (Marsh.) DC. American mountain ash. In woods 

 near Shay's Lake and perhaps an escape. 



Amelanchier canadensis (L.) Medic. Juneberry. May-cherry. No- 

 ticed in particular on high dry ground about the small lakes. 



Amelanchier oblongifolia (T. & G.) Roem. Shad bush. On low sand 

 ridges near the shore of Saginaw Bay. " In swampy woods throughout. " 

 C. A. Davis. 



Crataegus crus-galli L. Cockspur thorn. Frequent and usually in 

 dry open ground. "One tree about a foot in diameter noted in north 

 part of Akron Township." C. A. Davis. 



Crataegus punctata Jacq. Large-fruited thorn. Frequent in woods 

 and open ground. 



Crataegus tomentosa L. Pear thorn. Pear haw. Noticed by Prof. C. 

 A. Davis, near Unionville. Probably frequent throughout. 



Fragaria virginiana Duchesne. Common strawberry. Common in 

 damp or dry ground. 



Fragaria vesca americana Porter. American wood strawberry. In 

 rich woods along a small stream with high shaded banks near Murphy's 

 Lake. Also frequent on the "islands." 



Potentilla monspeliensis L. Rough cinquefoil. A weed in yards, fields 

 and along roads. 



Potentilla argentea L. Silvery cinquefoil. Frequent on dry sandy 

 ground. Noticed in particular on dry hills about the small lakes. 



Potentilla palustris (L.) Scop. Marsh five-finger. In very wet and 

 swampy places especially near the small lakes. 



Potentilla fruticosa L. Shrubby cinquefoil. "Moist or dry sandy 

 soil back of Algonquin beach in Akron Township.' C. A. Davis. 



Potentilla anserina L. Silver weed. In damp ground near the shore 

 of Saginaw Bay. Often very abundant. "Frequent on the sandy tracts 

 in the prairies of Akron and Wisner townships and in moist places along 

 the dunes of the bay. Rare inland in moist sand.' : C. A. Davis. 



Potentilla canadensis L. Five-finger. Common in dry open ground. 



Geum canadense Jacq. White avens. Common throughout in damp 

 rich woods. 



Geum virginianum L. Rough avens. " Rich woodlands and wet open 

 grounds." C. A. Davis. 



Geum strictum Ait. Yellow avens. Frequent in damp meadows and 

 moist grassy places. 



Geum rivale L. Water avens. In very wet places and wet open woods. 

 Noticed in particular near Cat Lake. 



Rubus idaeus aculeatissimus (C. A. Mey.) Regel & Tiling. Wild red 

 raspberry. Common in open dry or damp shaded ground. 



