Periodical Literature 255 



No influence of the age of the mother trees from which the 

 seed was derived on the height is noticeable in the 11-year plants, 

 although originally the plants from older trees appeared to be 

 weaker. But the plants from Norrland remain shorter than those 

 from more southern localities, the difference being nearly one foot 

 on the average, and even up to 28 inches. 



There are also other differences ; the whole habitus of the 

 northern plants is more slender with shorter and fewer branches, 

 and shorter needles, while the southern approaches a shrub-like 

 aspect and not quite as straight boles. Tabulated measurements 

 show the detail. The persistency of needles on the shoots for 

 several years seems, however, to depend on the climate in which 

 the plant grows, the original difference observed in the younger 

 trees having worn away. But the earlier and more thorough yel- 

 lowing of the needles in the pines of northern and alpine deri- 

 vation is striking. 



Another trial seeding was made with seed derived from Ger- 

 many. The latter produced considerably more height growth, 

 nearly double that of the Norrland pines, and also double the 

 diameters. Also the general habitus differs. The variation 

 curves bring out these differences between the three sets strikingly. 

 This difference of stronger development is pointed out as im- 

 portant in reforesting heaths and weedy places. 



Tallplantor av fro frdn olika hemort. Meddelanden frdn Statens Skogs- 

 forsoksanstalt Skogsvardsforenigens Tidskrift, 1914, pp. 61-107. 



Having recognized that the derivation of 



Seed seed from certain climatic localities is un- 



Supply desirable in certain other climatic localities 



on account of inherited characteristics, the 



German authorities laid an embargo on pine seed imported from 



outside Germany. The impropriety of this ruling is being shown 



up by Schultze and Pfeil. 



Within Germany itself "the climatic conditions are as 'particu- 

 laristic' as the Germans themselves," so that seeds from the mild 

 climate of southwestern Germany would be objectionable in 

 Eastern Prussia. As a result of the exclusion of imported seed 

 the yearly requirement of 200,000 to 300,000 pounds cannot be 

 met, since the necessary labor for collecting cannot be had. And 

 this condition has increased prices — $5 per pound — beyond ex- 



