Germination of Forest Trees 23 



Larix occidcntalis Colville N. F., Washington 191 1 



Abies lasiocarpa Priest River, Idaho 1913 



Abies grandis Priest River, Idaho 1913 



Picea sitkensis Coast of Washington 191 1 



Piims monticola Priest River, Idaho 1914 



Species Supplied by Commercial Seedmen or Collected 



Species Place Collected Date 



Pinus strobus Canada 1913 



Larix europea Europe ? 



Pinus ponderosa Black Hills, South Dakota 1913 



Pinus divaricata Northern Minnesota 1914 



Robinia pseudacacia Europe ? 



Catalpa speciosa Indiana 1913 



Ouercus rubra Michigan 1914 



Acer saccharum Illinois 1914 



Liriodendron tulipifera . . . Ohio 1914 



Betula papyrifera Pennsylvania 1914 



Abies balsamea Maine 1914 



Pseudotsuga taxifolia .... Colorado 1913 



Pinus taeda Southern states ? 



Tax odium distichum Southern states ? 



Liqttidambcr styraciflua . . . North Carolina 1914 



Acer saccharum Canada 1914 



Acer rubrum New Hampshire 1914 



Fraxinus americana Indiana 1914 



Juniperis virgmiana Missouri River, Nebraska 1914 



Gleditschia triacanthos .... Lincoln, Nebraska 1915 



Pinus monticola Glacier Park, Montana 1914 



Catalpa speciosa Lincoln, Nebraska 1915 



In the body of this report, in order to distinguish the climatic 

 varieties of a species, the name of the state in which the seed was 

 collected is given with the name of the species. 



The first planting was done on October 28, 1914. From that 

 . time on plantings were made as the seed arrived. The last seeds 

 were planted March 21, 1915. All experiments were conducted 

 between the first date mentioned and May 1, 191 5, a period of 184 

 days. In all cases ample time was allowed for the completion of 

 the process of germination. This time naturally varied with the 

 species. For most species three months was allowed but in the 



