VEGETABLE PRODUCTIONS OF NORWAY. 263 



The WHITE ALDER (A. incana, Willd. "Or," "Older," 

 " Hvidor," &c.). Grows as far north as Finmark. Its limit on 

 the mountains is intermediate to that of birch and fir. In 

 Finmark its altitude is about 1,200 feet above the sea. There 

 are about six known varieties. 



Amelanchior ovalis, D.C. ; A. sanguined, D.C. ; A. vidgaris, 

 Mbnch, are only found in gardens near Christiania. 



AMERICAN ABBOB VIT.E (TJiuja occidentalis, L.). Is found in 

 gardens as far north as Throndhjem, where it stands the winter 

 very well. Near Christiania there are trees 24 to 25 feet high. 



Ampdopsis hederacea, Mchx, or FIVE-LEAVED IVY, "Vild 

 Viia" Is common as an ornamental plant in the south of 

 Norway, and grows as far north as Throndhjem. It stands the 

 winter without protection. 



ASH (Fraxinus excelsior, L. "Ask") Is common in lowlands 

 as far north as lat. 62J. It does not attain a higher altitude 

 than 1,500 feet in the south, nor more than 100 to 200 feet 

 under lat. 62, where also it will attain a growth of 80 feet in 

 height. 



ASH-BERBERY (Mahonia Aquifdium, Nutt). Found in 

 gardens in the south up to Christiauia. It is not covered up 

 during the winter. 



ASPEN (Populus tremida, L. " Asp " or " Osp "). Is very com- 

 mon up to lat. 70. At Aarnjes, in Romsdal, lat. 63, there is a tree 

 60 feet high. Its limit on the mountains is about the same as that 

 of the Scotch fir. The Norwegian peasant adopts a very practical 

 way of getting rid of the troublesome shoots, which spring up 

 even at long distances from the tree, and which are very difficult 

 to eradicate from the soil. After the tree has been felled or 

 sawn asunder, at about 4 to 5 feet above the ground, he strips all 

 the bark off the stump. In about two years' time the root loses 

 all power of throwing out suckers. 



BASTARD INDIGO (Amorpha fruticosa, L.). Is cultivated near 

 Christiania. The tops are generally frozen off in the winter. 



BASTARD MOUNTAIN ASH (Sorbtis hybrida, L. " Rognasal "). 

 Is very common in lowlands in the south, and grows up to 

 Throndhjem. . On the eastern frontier it is not found higher than 

 lat. 60. In Hardanger it is very common to use stocks of this 

 tree for grafting pears on. The fruit thus obtained is said to be 

 better than by using common pear stocks. 



