was an octavo volume of 458 pages. It has been 

 reckoned to contain 3,389 species, of which 488 were 

 hardy trees and shrubs. 



In 1789 the elder Aiton published a more critical 

 Hortus Keivensis, in which 5,535 species are enu- 

 merated. 



The younger Aiton published in 1810 to 1 813 a second 

 edition in five volumes, " and in 1814 a catalogue or 

 epitome, as it is called, of the species contained in the 

 five volumes, for the use of practical gardeners ; it 

 contains . . 314 additional species, the total number 

 being 11,013." 



This is the latest comprehensive list of plants in 

 cultivation at Kew which has been published. 



Occasionally lists of special collections have been 

 issued since this date. Catalogues of the Ferns were 

 issued in 1845, 1856, and 1868 ; of the Hardy Herbaceous 

 plants in 1853 ; of Succulent plants in 1856 ; of Aroidece 

 in 1878 ; of Bromeliacece in 1879 ; of Aloinece, Yuccoidece, 

 and Agaves in 1880 ; of Economic plants in 1881 ; of 

 Palms in 1882; of Primulas in 1886; and of Orchids 

 flowered at Kew, in 1891. Since 1885 lists of seeds 

 available for distribution with other botanical establish- 

 ments have been issued annually. 



An Arboretum has been for more than a century a 

 feature of the Kew establishment. Perhaps it dates its 

 formal commencement from 1762, when " all the Duke 

 of Argyll's trees and shrubs were removed to the 

 Princess of Wales's garden at Kew, which now excels all 

 others, under the direction of Lord Bute." 



