* 
xvi PREFACE. 
fo the most eminent botanical characters of our age 
Sir Joseph Banks, with his accustomed liberality, sup- 
ported my undertaking by giving me access to his 
extensive library and herbarium. A.B. Lambert, Esq. 
favoured me not only with the same assistance, but very 
— handsomely offered me the entire use of his library and 
collection during the compilation of the work, To this 
gentleman I am in the highest degree indebted for his 
strenuous support under all the difficulties I had to en- 
counter during its progress; which by his generous | 
exertions he endeavoured to remove whenever they 
occurred, | 
Among the many new sources. of it 
«necis to te I must particularly Eis the following 
ons » by the assistance of which I havebeen | 
enabled to correct many errors of former ne politi 
particularly respecting the synonyms. 
I. Clayton's Herbarium.The whole of this interest- 
ing collection, from which the “ Fron . Virginia’ ' of 
*Gronovius was compiled, is preserved in the Banksian 
Museum. ‘This has been particularly useful to me in 
Basing the plants which Linnæus had men from me 
dL S P. S. Pallas's Herbariumi — This. exten- 
er ora now in the possession of A. B. Lambert, 
Esq. was highly useful to me, in comparing the plants 
. uf North America with those of the North of Asia, to 
some of which they have a great a, and others are 
common to both continents, ` 
HI. Plukenet's Herbarium oi in the Big : 
, Museum, as also part of — 
_ IV. Catesby’s Herbarium, 
