954 THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 
plants, on terms whfich] are easy to me. The Authors have 
figured but few N. American ferns. Their Woodsia Perriniana 
is exactly the plant which I have called Hypopeltis obtusa—the 
Aspidium obtusum of Willd. & Muhl.! Some specimens by 
mistake found their way among a collection of West Indian 
[plants] made by a M. Perrin. One was sent by me to Sprengel 
several years ago, who named it Alsophila Perriniana. Another, 
named according to Sprengel, was transmitted to Hooker—who 
has given a very good drawing of it in his work. The plant is, 
however, not a native of the West Indies at all, & is doubtless 
the species of Aspidium named by Willd. & Muhl. obtusum. The 
indusium is not upon, but beneath the sori, as in Woodsia, but I 
thought it differed so much from the other Woodsiae that it was 
proper to make a new genus for it. But upon the whole I am now 
inclined to follow Hooker in altering the generic character of 
Woodsia so as to receive the present species & its name must be 
W. obtusa. 
I congratulate you on the completion of your Synopsis of N. 
American Fungi [76] & hope you will urge the publishing committee 
of Phil. Society to have the work printed with expedition. Mr. 
Halsey will doubtless allow me to use your rough copy of the 
Manuscript for the purpose of making out the list of genera that 
I requested of you.—The promise of the loan of Fries’ work on 
Cryptogamous plants [24] I am very thankful for, & I hope you 
will forward it to me as soon after your return as may be conveni- 
ent. It shall be carefully preserved & returned in a short time. 
Please inform me in your next letter what is the price of the book, 
& the best method of obtaining it. 
I sincerely hope, My Dear Sir, that your ‘ntended journey may 
be the means, by God’s blessing, of restoring you to perfect 
health. I did, indeed, hear that you had been in poor health, 
last summer, but it was my impression that you had long since 
recovered & had resumed your scientific pursuits. Hence the 
remarks in my last letter, which I very much regret caused you 
the least pain. You will pardon them, however, (I trust) when 
you know that they were elicited by the sorrow I felt, under the 
impression that so good a friend as you, had for unknown reasons 
seen fit to suspend his communication with me. 
ee 
