8 



BLTLLETI:N' 957, U. S. DEPASTMEK'T OF AGIMGULTURE. 



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, showiag the known distribution of 

 white-piae blister rust in North America to and including 1911. 



Fig. 6.— OutUne map of the northeastern part of the United States, showing (by black dots) the known 

 distribution of wliite-pine bUster 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 Eraser's nursery at 



