Effect Upon the Groivih of Douglas Fir. 501 



terest for our reforestation work with Douglas Fir. The re- 

 sults tabulated and illustrated by a series of paragraphs clearly 

 show the marked difference in the general appearance, growth, 

 height, and hardiness of the seedlings raised from seed obtained 

 from dift'erent sources. In Table Xo. i are given the results of 

 the tests made with the seed of 1910." 



The seed from the Snocjualmie (sample No. 11), and from 

 the Tahoe (Xo. 12) represent the Coast form. The growth of 

 seedlings from this seed was faster than that of any of the 

 others but of a quite different type from the rest. Von Berg 

 calls this the "shrubby form" type, as the stems and branches 

 are long but slender and crooked causing them to suffer greatly 

 from snow. The latter often crushes them entirely. The seed- 

 lings from all other seed have a straight, upright stem, and re- 

 sist the pressure of the snow in a remarkable degree. The 

 seed from the Tahoe, California, has been very nearly destroyed 

 by frost during the second winter. The seedlings from Sno- 

 qaulmie, Washington, on the west side of the Cascades, have also 

 suffered severely from cold. 



The seedlings raised, from seed collected on the Chelan, in the 

 same range of the Cascades as the seed from the Snoqualmie 

 but on the eastern slope, have grown very nearly as high as 

 the seedlings from Snociualmie but stand upright and have scarcely 

 suffered at all from the frost. Only from one to two per cent. 

 of the seedlings have brown tops. If the seedlings prove resistant 

 to damage by frost in the future, the seed from Chelan Forest 

 furnishes the best variety of all for Livonia. 



The seedlings from Colville Forest are very similar to the 

 seedlings from the Chelan, except that the seedlings grow some- 

 what less vigorously than the Chelan seedlings but appear to be 

 hardier. The seedlings from Colville and Chelan Forests have 

 grown very nearly as vigorously as the Coast from Tahoe and 

 Snoqualmie, but dift"er from the Coast form by the upright stem 

 and marked resistance to frost. It is possible that the severe 

 winter might damage the Chelan and Colville seedlings in Livonia, 

 but for most of the National Forests removed from the Coast 

 they are probably the most valuable varieties. 



The seedlings from Montana and Idaho showed a rather uni- 



*The report was accompanied by a series of photographs showing the 

 differences of development, which it is not necessary to reproduce. 



