8 
BULLETIN 957, U. S. DEPARTMENT OF AGRICULTURE. 
is definitely stated to have been introduced into England (the proba- 
ble first point of introduction in Europe) in 1812 by Thomas Nuttall. 
Evidently Nuttall collected the seeds of this plant while on a botanical 
Fig. 5, 
-Outline map of the northeastern part of the United States, showing the known distribution of 
white-pine blister rust in North America to and including 1911. 
Fig. 6.— Outline map of the northeastern part of the United States, Showing (by black dots) the known 
distribution of white-pine blister rust in North America to and including 1912. 
trip in 1811 with John Bradbury up the Missouri River to a point in 
the eastern part of Mercer County, N. Dak. His material must have 
been shipped quite promptly to England, as Fraser's nursery at 
