PINUS BANKSIANA IN MINNESOTA 



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In June, 1915, a grove of Jack pine was found about 3 miles 

 west of Rushford in the Root River valley, near the southestern 

 corner of the state. This station is about 120 miles southeast of 

 the previously known limit in Minnesota and about 50 miles 

 southwest of the nearest place where Jack pine is known to us 

 to occur in Wisconsin. The grove is situated just west of the 

 western edge of the driftless area. It lies on a north-sloping 

 hillside which is built up from disintegrating paleozoic sandstone 



Fig. 1. Isolated grove of Jack pine {Pinus Banksiana) in southeastern Minnesota 



SO that the soil is very similar to that of the typical Jack pine 

 country of north central Minnesota and central Wisconsin. 

 The grove is 5 or 6 acres in extent and contains several hundred 

 trees of all ages and sizes, with numerous seedlings. One part 

 of the grove is almost a pure stand of pine (see figure), while 

 other parts contain a considerable admixture of scarlet oak and 

 poplar with undershrubs of Corylus americana Walt., Rubus 

 idaeus L. var aciileatissimus Regel & Tilling, Ilex verticillata (L.) 

 Gray, and Cornus sp. Most of the pines range from 7 to 12 

 inches in diameter and 40 to 55 feet in height. There are also a 



