eg MENS Meg cig ee ee tare / 
THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 143 
Collins more than once, but have never been blessed with an 
answer. I am much obliged to you for the promise of Pilularia 
& Marsilea.—Could you procure me specimens of Psilotum, 
Acrostichum aureum, Vittaria, & Hymenophyllum—I should be 
very glad indeed. If I can serve you with a good European Speci- 
men of Salvinia natans I shall do so with pleasure. 
Mr. Van Vleck wishes me to express to you his sincere thanks 
for your kind offer to send him plants from your vicinity. In the 
course of this year I hope to furnish you with speclimens] of all 
not yet in your collectlion] which our vicinity contains. The idea 
I had of writing a review of the Musci frondos. for Mr. Silliman’s 
Journal [6] I have given up for the present on account of my im- 
perfect knowledge & the increasing number. (So for instance I 
have lately discovered a new species of Andr[elaea in great plenty 
on our mountains which I intended to send you—but forgot it, 
till the box was closed.) But I am preparing a monography of 
the genus Viola [68]—which I shall either send to you for Silli- 
man’s Journal or else try to get it inserted in the Philosophical 
Transactions. Is there a prospect that a volume of that work will 
appear shortly? I ought to do something of the kind to acknowl- 
edge the honor done me, by making me a member of that Society. 
I shall now give you my remarks on your & Mr. Nuttall’s ex- 
cellent remarks on the plants sent you—very earnestly begging 
you to continue them—for this is the only right way to acquire 
accurate knowledge. 
Gratiola sphaerocarpa. I cannot think this your neglecta or that 
must be different from what I conceived it—my sphaero{carpa|— 
(tho’ to be sure I was doubtful whether it is the plant of Elliott) 
jis nearer virzinica &c. a very large plant—what I took for your 
neglecta is very small & somewhat hairy—but I may be mistaken. 
Lycop{us] exaltatus. I cannot conceive how I came to send you any 
plant by that name. I have none such—TI find the only Lycop. 
marked as sent you in my list Lycop. angustifolius Ell. p. 26, which 
is certainly very different from L. europ. (of the latter Mr. Halsey 
has sent me a speclimen] exactly like my European). The angus 
tifol. has an entirely different habit—grows 4 feet high without 
branching & looks a little like Leonurus cardiaca. 
Cyper[us] uncinatus (C. inflexus Muhl.) is not the Cy. squarros. of 
