VI PREFACE. 



The use of the first class of portraits is, to give a palpable idea of the general 

 magnitude, form, and character, which different species and varieties assume 

 when growing in the same soil and climate, even in so short a period as ten or 

 twelve years after planting. A slight comparative view of these portraits shows 

 that the growth of some trees is much more rapid than that of others ; and that 

 while the species of some genera when young are comparatively monotonous 

 in their general form, those of the species of other genera of the same age have 

 marked and characteristic features. Hence the valuable assistance afforded 

 by such portraits in the choice of trees for the purposes of landscape-garden- 

 ing. To solve the problem of ascertaining the species capable of producing 

 any desired effect of wood, or of trees, in a given locality, and in a given time, 

 it is only necessary to turn over the portraits which are contained in the last 

 four volumes of this Work, and to select those species, the portraits of which 

 exhibit trees of such forms and magnitudes as will produce the effect desired. 



The second class of portraits represents full-grown trees of the same spe- 

 cies as those of which portraits in their young state are given ; and these, for 

 the greater part, are drawn from trees within ten miles of London, and all, 

 with one or two exceptions, are to one scale. The object in giving these 

 portraits of full-grown trees is, to show the magnitude and character which 

 particular species attain when they arrive at maturity, and to be a guide to 

 the planter, not only in many particulars having reference to pictorial effect, 

 but also with respect to the uses of trees as productive of timber, shelter, 

 and shade. 



These portraits of trees in their young and mature state, which are contained 

 in the last four volumes, together with the engraved botanical specimens, and 

 the scientific and popular descriptions contained in the four volumes of letter- 

 press, are calculated, as the author thinks, to create that interest in trees and 

 .shrubs in those who have not previously paid much attention to the subject, 

 to produce which, as already observed, has been his grand object in under- 

 taking this Work. 



In addition to the trees and shrubs which have been ten or twelve years in 

 the country, and which are purchasable in British nurseries, those of more 

 recent introduction, which are comparatively scarce, are also described or 

 noticed; as are some which were introduced at former periods, and have been 

 lost, and others which are known to botanists, but which have not yet been 

 introduced. 



Besides notices of new and little known hardy trees and shrubs, or of 

 such as are described by botanists but not yet introduced, some attention 

 has been [laid throughout the Work to trees and shrubs which, though they 

 will stand through the winter in mild seasons, without protection in favourable 

 situations, or with protection in situations and seasons less favourable, in the 

 climate of London, yet cannot be recommended for general purposes, and 

 are therefore generally described by gardeners as only half-hardy. These 

 half-hardy species have been noticed, because there is perhaps no scene in 

 a British garden more interesting, than one in which the plants of warm 



