50 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



Of the conifers of Korea which are enumerated by Mr Wilson, 

 few are in common cultivation, though there are some good 

 trees in this country of Picea jezocns is, which used to be known 

 by various names, such as P. ajancnsis and P. hondocnsis. 

 Juniperus chinensis has been cultivated for long, and seedlings 

 of Mr Wilson's collecting of Abies nephrokpsis, A. holophylla, 

 and Picea Koyamai are doing well. It is now seven or eight 

 years since Larix dahurica, var. Principis-Rupprechtii was intro- 

 duced, and seed of it was distributed four years ago by the 

 Scottish Board of Agriculture, the plants raised from which are 

 generally thriving and much more promising than any plants I 

 have seen of its unsatisfactory near neighbour L. sibirica. 

 Pinus koraiensis and P. densiflora were introduced to Europe in 

 1 86 1 and 1854 respectively, but neither gives much promise of 

 becoming valuable timber. 



The broad-leaved species mentioned by Mr Wilson are none 

 of them familiar in British collections. The timber of Quercus 

 mongolica and Fraxinus mandshurica have both been imported 

 to England, and I have used them successfully for flooring at 

 Dawyck. Populus Maximowiczii was sent to me some years 

 ago by Professor Sargent. It is a poplar of handsome foliage, 

 but, unfortunately, very liable to injury from autumn frosts in 

 our climate. Fraxinus mandshurica was introduced at Kew in 

 1882, but suffers in this country from spring frosts. Zclkova 

 serrata, better known here as Z. acuminata or Planer a japonic a, 

 introduced by Veitch in 1861, has not proved a success, and 

 few have reached 30 feet in height, though in eastern America 

 this tree flourishes. It will be noted that Mr Wilson classes it 

 as the most valuable hardwood of Korea. The oaks mentioned 

 were introduced to this country some twenty to twenty-five 

 years ago, but not one of the three gives much promise so far. 

 All are thriving at the Arnold Arboretum. Tilia amurensis, so 

 far as I know, has not yet been introduced into Europe, and 

 Juglans mandshurica and Castanea crenata are little known. 



Speaking generally it would seem that Korean trees are more 

 likely to thrive in eastern America than in western Europe. 

 Our summers are probably not long or hot enough. There is a 

 marked correspondence between the climates of western America 

 and western Europe, and eastern Asia and eastern America 

 as regards the growing of trees. Of the American Pacific Coast 

 trees, so many of which are our most valuable acquisitions, 



