970 



MINNESOTA BOTANICAL STUDIES. 



Shrubs like Sorbus, Rosa, Vitis, and others that do not endure 

 well an occasional submersion are altogether absent from the 

 mid strand. A list of mid-strand vegetation at Oak point is 

 presented here. 



Mid-strand group at Oak Point. 



Equisetum arvense. 

 Equisetum hiemale. 

 Agropyron tenerum, 

 Agrostis alba. 

 Elyinus canadensis. 

 Hordeum jubatnrn. 

 Panicuai dichotoiuum. 

 Carex iililormis. 

 Juncus articulatus. 

 Juncus balticus. 

 Populus treuiuloides. 

 Salix fluviatilis. 

 Salix lucida. 



Salix petiolaris var. gracilis. 

 Chenopodiuin album. 



Chenopodiuin leptopliylluin. 

 Arenaria stricta. 

 Capnoides micranthum. 

 Arabis hirsuta. 

 Bursa bursa-pastoris. 

 L.epidium apetalum. 

 Primus puniila. 

 Potentilla arguta. 

 Spiraea sa icifolia. 

 Lathyrus maritimus. 

 Epilobiuni adenocaulon, 

 Artemisia canadensis. 

 Artemisia caudata. 

 Erigercn canadensis. 

 Solidago juncea. 



For comparison there is also given the mid-strand population 

 observed across the lake at Sandy beach on the Northwest 

 Angle. 



Mid-strand group at Sandy Beach. 



Agropyron tenerum. 

 Agrostis alba. 

 Agrostis hi cilia lis. 



Elymus canadensis. 

 Carex filiformis. 

 Carex scoparia. 

 Carex siccata. 

 Juncus balticus. 

 Populus tremuloides. 

 Betula glandulosa. 

 Polygonum hartwrightii. 

 Corispermum hyssopifolium. 

 Cerastium arvense. 

 Potentilla arguta. 



Prunus puniila. 

 Spiraea salicifolia. 

 Hypericom ellipticum. 

 Chamaenirion angustifolium. 

 Epilobium lineare. 

 Onagra biennis. 

 Cornus baileyi. 

 Cornus sericea. 

 Convolvulus sepiuni. 

 Campanula apariuoides 



var. grandiflora. 

 Artemisia canadensis. 

 Artemisia caudata. 

 Solidago juncea. 



These two lists do not give a proper idea of the difference 

 between the two beaches, for it lies less in kinds of plants than 

 in the types which are abundantly developed. It will be ob- 

 served that such characteristic sand plants as Agropyrum tene- 

 rum, Elymus canadensis, Artemisia caudata and Artemisia cana- 

 densis, are present in each case. As a matter of fact, the Oak 

 point mid- strand is characterized by the strong development of 

 Prunus pumila, Lathyrus maritimus and Populus scrub with 

 Juncus and Salix abundant as secondary plants. But the Sandy 

 beach mid-strand is characterized by the prevalence of Cornus 

 baileyi and Cornus sericea with Convolvulus, Onagra and Cha- 

 maenirion. These larger leaved plants indicate 'a reaction in 

 the plant population to the quieter, less wind swept character 



