4 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



out. As compared with the European, the Japanese larch here 

 is of a decidedly lighter green and has a rougher bark. 

 Larix occidentalis. A failure. 



Larix sibirica. A failure : suffers like so many other con- 

 tinental species from spring frosts. 



Pseudotsuga Douglasii, Douglas (var. glauca or Colorado 

 variety). Quite healthy-looking with a fine dense covert; in 

 growth between the two larches; it is 19 years old against the 

 15 years of the Japanese larch. So that here Japanese larch 

 has beaten the ^^ glauca" Douglas easily, in rapidity of growth. 



Quercus macrocarpa. Almost one of the best trees in the 

 arboretum. It runs up with good straight stems and a dense 

 covert. At 19 years averages 3 inches diameter by 18 feet high. 



Quercus tinctoria. One of the best oaks in the good collection 

 of oaks here. At 18 years, 3 inches by 23 feet high. This I may 

 add is one of the best oaks in the fine collection of the Melbourne 

 Botanic Garden. 



Quercus tinctoria var. macrophylluni. This looks even better. 

 It shows good growth and is of a handsome appearance with 

 its big dark-green leaves. At 20 years it averages 3 inches 

 diameter by 37 feet high, and shows a vigorous even growth. 



Quercus palustris. At 2 1 years it averages 4 inches diameter by 

 40 feet high. In the fine collection of oaks here it is only 

 surpassed by Quercus rubra. It is one of the best of the 

 American oaks. 



Quercus rubra. Easily the best in growth of all the oaks here. 

 Average, 7 inches diameter by 32 feet high at 27 years of age. 

 Maximum, 10 inches diameter by 55 feet high. The average 

 diameter strikes the eye as 30 per cent, and the height 25 per 

 cent, above that of Quercus sessilifiora alongside, this being 

 20 years old, or 7 years younger than the Quercus rubra. 



Quercus rubra grows very well generally in Belgium, in damp 

 soil, says M. Drion, but fails elsewhere. Shoots like a poplar, 

 he adds, in favourable soil, viz. plateaux with fertile soil and 

 the edge of water-courses and marshes. At Rawenstein, near 

 Quatre-Bras close to Brussels, is a hectare planted pure with 

 Quercus rubra and doing well. I saw quite a show of timber 

 specimens of Quercus rubra at the Ghent Exhibition, and there 

 were photographs of oaks cubing 4^ cubic metres. 



Quercus sessilijiora. Is of exactly the type I noted in the 

 forest of Soigne, generally. There is a good description of this 



