250 Dr. Hooker on American Botany. 
author,) bids fair to rank among the most valuable that has 
appeared inthat country ; the Flora of the Middle and North- 
ern Sections of the United States, by Dr Torrey. A frequent 
correspondence, and a mutual interchange of botanical speci- 
mens, have made us acquainted with the zeal and acquire- 
ments of this gentleman ; both of which are now assiduously 
engaged in the preparation of his aia. the continuation of 
which we anxiously expect. No. I. extends as far as, but 
not to the conclusion of, the Class Bristle and Order Di- 
wa; for bere likewise the arrangement is that of Linneus. 
The whole is in English. The synonyms are sufficiently co- 
pious, and the descriptive part contains much useful criticism 
and observation. We know, too, that Dr. Torrey has made 
a most ample collection of the cryptogamic plants of the 
‘United States ; that he is well Spqnainies with the species 
and their characters; and we may therefore confidently hope 
that this department. of botany will now find a place in the 
Floras of North America. 
Our attention has hitherto been almost exciusively turned 
to the progress of botany in the United St Phere is 
still a vast extent of highly interesting country to the north- 
ward, from the 45th parallel of lat. to 74, including 29 de- 
, and to the westward, which, as being for the most part 
eitber in the acknowledged possession of the British govern- 
ment, or of the Hudson’s Bay Company, or what has been 
explored by British enterprise, we shall denominate the Bri- 
tish gerne in North America. 
