THE CORRESPON DENCE OF SCHWEINITZ AND TORREY 257 
[24]) which, I suppose, were received by you in due time. Since 
then I have made another visit to the country with my family, 
so that my botanical & other studies have been interrupted. 
I am now finishing my edn. of Lindley’s Work on the Natural 
System of Botany [46]. The Appendix concerning which I have 
written to you before is partly in type, but the printers proceed 
very slowly. I have obtained your mss volumes on N. Am. 
Fungi [76] from Mr. Halsey & have made out a list of the genera,— 
but not until I had sent off the vol[ume] of Fries’. In “Cohors 6 
(Hyphomycetes)”’, series 2, 3, 4, 6, & 7 are not named—is this 
an intentional omission? 
I have made out a list of the Musci & Hepaticae, in which I 
should differ, perhaps, from some of my friends, respecting the ar- 
rangement & number of Species—but it seemed to me better to 
include none but such as are well ascertained.—The order Algae is 
very small—that class of plants having received but little atten- 
tion from our botanists. I should take it as a very particular 
favour, My dear Sir, if you would furnish me with a list of the 
species which you have found, or know to inhabit N. America, 
named according to Agardh’s Systema Algarum (3). I expect 
the number is so small that it will not require much time to make 
it out.—Yet I would not trespass even this much on your hours of 
study, were not the object so important. 
I suppose you have seen the 2nd No of Dr. Hooker’s FI. Bor. 
Amer. [34] which proceeds nearly through the Caryophylleae 
(following the order of De Candolle)—The estimable author in- 
formed me last May that he had just finished the 3rd No. whlich] 
concluded the Leguminosae. This work throws much light on 
N. Amer. botany & will be of great service to the one who shall 
write a general Flora of our Country. 
We have but little botanical news here—Indeed I stand almost 
alone in the Science—for Mr. Halsey is so much occupied with 
business that he cannot prosecute his favorite study with any 
advantage to himself or others.—I told you before that Mr. 
Cooper-does not attend to botany any more, except to look over 
a new work when one appears. Le Conte can hardly be called a 
New Yorker—for he is rather a cosmopolite. There is scarcely 
any one who takes an interest in my labours, & were it not for 
