274 Dr. Hooker on American Botany. 
Michaux, J. Bartram, and a Mr. Tilden, from Hudson’s Bay, 
is in the Sherardian Herbarium at Oxford ; thatof Plukenet, 
in the British Museum ; ; of Hae (in the possession of Mr 
of the northern parts of America; of Mr. edie, which 
was formed in er Louisiana, in the possession, we be- 
lieve, of the Botalhe Garden at Liverpool ; and of A. Men- 
zies, Esq. which was selected, during that Seleee s voyage 
with captain Vancouver, upon the N. W. coast of America. 
Nor should the various collections be ciated which are 
ee in the gardens of Eugland, especially in the vicinity of 
Lo 
“Thus ‘prepared, the Flora Americe Septentrionalis, ora 
ematic Arrangement and Description of the Plants of 
North America, by Fk. Pursh, appeared in London in the’ 
year 1813, with 24 well-executed plates of new species, in 2 
vols. 8vo. The be cific characters are in Latin, the obser- 
vations in English 
The arrangement is that of the sexual system; but the 
author has m considerable deviations from the wenerally 
reegived arrangement of the Linnean school. ‘The classes 
Dod ria and Polyadelphia are omitted, as well as Mone- 
tra, Diecia, i and Polygamia; and their genera are referred to 
ether classes, some acco rding to the number of stamens, 
ethers to his 19th class, which is called Diclinta, and which 
‘contains Euphoritacee, Amentacee, and Conifere ; thus bring- 
ing into his arrangement a union of a natural and artificial 
system, which has not been adopted by others. 
Michaux’s work included the whole of the class Cryptoza- 
gaa; but this, though all perhaps that was then known, con- 
tained so scanty a list as scarcely to deserve notice. 
Pursh 4 steps to go no farther than the order Filices bf the 
lass Cry ptogamia. 
time after the publication of his Flora, the author 
again ok America, but with a view of confining his re- 
to a part which had been very little explored, namely 
Crnadi There he died in 1820. His herbarium of that 
ot atry, which was considerable, has been purchased by Mr. 
Lambert, who, we believe, is also the possessor of that far 
“more extensive and valuable one sag Sipe had made. in 
’ avels i in the United State 
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