UA Se 
THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 137 
ance in your work, & I believe you will then have all that has been 
observed in the States north of Pennsylvania. All the botanists 
here send me everything they collect; so that I can thus do for 
you a great deal more than I could do alone. 
You enquire respecting Mr. Nuttall.—I mentioned just now 
that he had lately made a visit to this city, but he resides now 
in Philadelphia. Mr. N. returned last spring from another éxpedi- 
tion up the Missouri, & into the Arkansas Territory. He spent the 
year 1819 there & discovered a great number of new plants—prob- 
ably about 300 species. He is now printing his Journal [56], but his 
botanical discoveries [54] he is preparing to publish in the next 
volume of the American Philosophical Trans. of Phila. He found 
comparatively few cryptogamia, & all of them except the Ferns, he 
has given to Zaccheus Collins Esq., of Phil. This gentleman has 
undertaken to examine them, as Mr. Nuttall has not paid great 
attention to this department of Botany. I doubt much however 
whether Mr. C. will consent to have his opinion of the specimens 
published, even if he should give any opinion. It is surprising 
how exceedingly cautious this gentleman is in this respect; for the 
(perhaps) hundreds of specimens which I have sent him, he has 
never returned me the name of one—You had better however 
write to him, as he may send you specimens if he will not give 
you descriptions & names of plants. Mr. Nuttall found on the 
Red & Arkansas Rivers, Pilularia, & Marsilea, which have 
not before been observed in North America—I have duplicates 
for you which shall be sent soon. 
I am very glad you are so much inclined to continue in corre- 
spondence with me and my friends—It will no doubt be in my 
power to furnish you with many northern plants that do not 
grow in this neighborhood, as I am in active correspondence with 
most of the botanists in this part of the country. I intend soon 
to put up a package for the Right Rev. Mr. Van Vleck & shall be 
happy to open a correspondence with him on Botany. 
You ask whether Mr. Silliman would give place in his Journal 
[6] to a short review of the Musci frondos, of N. Am? I answer— 
undoubtedly & if you send it soon it will be in time for the next 
No. You can send it directly to him, & transmit it to my care— 
Remarks on the plants you kindly sent me last fall: 
