CHAP. lI. BRITISH ISLANDS. 117 
wood, the late intelligent curator. The arboretum, which was 
laid out and planted by him in 1798-9, does him lasting ho- 
nour.” Of the Pinus Pallaszana, there are two fine specimens, 
the largest 40 ft. high, with a trunk 2 ft. in diameter at 1 ft. from 
the ground, which are probably the best to be met with in 
Britain or Ireland. What is remarkable in British nurseries, 
though common in French ones, there is a Pinus Cémbra, which 
was grafted on,a Scotch pine about 20 years ago, and now 
forms a fine tree. ‘The garden contains 30 statute acres; it 
is described and engraved in Dr. Walsh’s History of Dublin, 
and, on the whole, is not only the largest in Europe, but the 
most comprehensive in its plan. Since the death of Mr. Under- 
wood, in 1834, it has been put under the curatorship of Mr. 
‘Niven, one of the most scientific gardeners and active-minded 
men in the profession. Mr. Niven’s plan for the improvement 
and future management of the Glasnevin Garden is intended to 
include, not merely the extension of the arrangements of plants 
botanically, but also an agricultural and horticultural selection 
of hardy fruits and vegetables, for the purpose of following up 
the important subject of improving, by crossing, the best existing 
varieties of such fruits and vegetables. 
Sussect. 5. Of the Foreign Trees and Shrubs introduced into Britain 
in the 19th Century. 
During that portion of the nineteenth century which has now 
(1835) elapsed, the taste for foreign trees and shrubs has con- 
siderably increased among planters; and the number of new 
species and varieties that have been introduced, is proportionately 
greater than at any former period. Botanic gardens and arbo- 
retums have also become more general, and the variety intro- 
duced into shrubberies and ornamental plantations, though still 
not so great as it might be, bears some.relation to the general 
improvement. The establishment of the Horticultural Society 
of London in the early part of the century, has had a material 
influence in spreading a taste for every department of gardening, 
not only in Britain, but throughout the civilised world. The 
interest, however, which belongs to this century, is greatly 
diminished to the present generation of readers, from the circum- 
stance of the greater part of it being within their recollection, 
For this reason we shall limit ourselves to giving a short com~ 
parative view of the species of trees and shrubs which have been 
introduced, and a slight notice of the principal arboretums which* 
have been formed; taking, as our authority for the date of the 
introduction of the trees and shrubs, our Hortus Britannicus. 
In the first decade of the nineteenth century, viz., from 1801 
to 1810 inclusive, ninety-four trees and shrubs were introduced : 
