PAPERS OX BIOLOGY AND AGRICULTURE 201 



tures or on rocky hillsides, often of nigged topography. 

 Survey of these areas made on foot and covering every 

 square rod is a slow process. Three outstanding areas 

 of escaped bushes have been found in the surveyed terri- 

 tory, namely, at Gurnee, Lake County; Galena, Jo 

 Daviess County: and Ghana, Ogle County. They are 

 widely separated and possess different characteristics. 



THE GURNEE AREA 



The Gurnee area is located in Lake County and has the 

 largest number of bushes. The number of bushes is esti- 

 mated at 5,000 and there is a wide variation in size and 

 age. Most of these bushes were growing in a 40-acre 

 woodlot on the farm of a Mr. Lake. Other scattered 

 plantings were found along highways, hedges, and fences 

 for several miles around. Seedlings, sprouts, and large 

 mature bushes were all growing together in timber 

 forming a dense growth of underbrush. Unlike most 

 areas, the escaped bushes were not closely associated 

 with streams. The original source of these bushes 

 was a hedge near the old homestead on the Lake farm. 

 This hedge had been eradicated some years ago. 



THE GALENA AEEA 



The Galena area was found during the summer of 1922 

 and is located about the city of Galena in Jo Daviess 

 County. The topography is extremely rough due to its 

 being unglaciated, and many difficulties were encountered 

 by the field men. It was necessary to survey twelve sec- 

 tions on foot and considerable time was thus consumed. 

 Unoccupied property offered another stumbling block 

 to the efficient destruction of the barberry. There were 

 approximately 1,500 bushes found within a radius of 

 about two miles from the original planting. Many were 

 growing against rocky cliffs (Fig. 1) and in ravines that 

 were almost inaccessible to the scouts. Digging was a 

 difficult process and sprouts invariably appeared after 

 digging because the roots could not be entirely removed. 



This area originated from a large hedge planted in 

 Galena in 1844. In general the escapes are scattered 

 along hillsides on both banks of the Galena river. Birds 



