MICHIGAN'S SHIFTING SANDS. 13 



Twisted Willow Grass, Draba incana arabisans. S. Wats. 



Range: Along the Great Lakes. 

 Wild Lupine, Lupinus perennis L. 



Range: Sandy soils generally over Lake Region. 



( a i vense L. 

 The Clovers Trifolimn < piatense L. 



/ repens L. 

 Rigid Tick Trefoil, Meibomia ridida (Ell.) Kuntze. 



Range: Dry soils of Michigan. 

 Narrow Leaf Hush (Mover, Lespede/,a augnstifolia (Pursh) Ell. 



Range: Dry soils of Michigan. 

 Beach Pea, Lathyrus maritinms (L.) Bigel. 



Range: A perrenial decumbent pea vine of great value on the Great 



Lake Region. It is perfectly hardy and a good spreader. 

 Sand Violet, Viola subvestita Green. 



Range: Throughout Lake Region. Several -other members of this 

 genus do well in a partial shade or dry or sandy soils, and 

 should IK* em ouraged. 

 Fire Wee;1, (liamaenerion augustifolinm ( L. ) Scop. 



Range: Dry soils and comes in readily after clearing and tire. Com 



mon over the Lake Region. 

 Oakes' Evening Primrose, Oenothera Oakesiaua Robbius. 



Range: Common along the Great Lakes. 

 Large Purple Gerard ia, Agalinis purpurea (L) Hritton. 



Range: Common on low lying Hats along the shores of the Great 



Lakes but not on the drift sands. 

 Twin Flower, Linnaea americana Forbes. 



Range: On north slopes and cool cover. Not on sands unless shaded 



and moist. 

 Peach Cocklebnr, Xanthinm echinatum Murr. 



Range: A coarse sand \veed, growing along lake shores and river-. 

 White Aster, Frost Weed. Aster ericoides L. 



Range: On dry soils of Michigan. 

 Lake Huron Tansy, Tanacetum hiironense Xutt. 



Range: On sand dunes of north part of the Southern Peninsula, and 



north. 

 Canada Wormwood, Artemisia canadensis Michx. 



Range: A perennial root plant growjng on sand dunes from Xe\\ 



Buffalo to Mackinac City. 



Only a small number of plants, grasses and trees of this list foim 

 active, aggressive, advance agents of natural reclamation. Tin 1 iv-i 

 establish themselves gradually and only after some little protection is 

 afforded by the advance growth. 



TOVKR TYPES. 



There are two distinct forms or types of cover to deal with before a 

 final forest cover is established. The first is a temporary type and in- 

 cludes all those hardy persistent aggressive plants above listed. The 

 most prominent being the beach grass, or Marram, the sand pea. the Wll- 

 lows, poplars and sand cherries with often a sprinkling of paper birch. 

 These form the temporary type which establishes a crust on the sand 



