THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 201 
I arrive at this class I shall doubtless have the pleasure of quoting 
your N. A. Fungi, & Halsey’s Licholog. American.!! The Algae 
will give me some trouble & they will be in the smallest number of 
any of the orders.—You may well suppose that I have but little 
time, after attending to my book & some little practise of medicine, 
besides an occasional look (for I can’t help it) at the curious things 
in mineralogy that are daily brought in. But having made some 
arrangements in my concerns, by which I have more leisure than 
formerly, I shall again endeavour to be punctual in my corre- 
spondence & at least to write you a letter once in two or three 
weeks & to exchange specimens of plants with you. 
I think I mentioned in former letter that Mr. Cooper, one of our 
old botanical friends, had returned from his travels in Europe. He 
wishes to take up some little-known department of N. American 
Botany, & I advised him to let it be the Class Syngenesia. Do you 
think of any other field which he could cultivate more profitably? 
Should he engage in this or any other botanical subject, I hope 
you will find leisure to correspond with him. 
I will now make some observations on the grasses etc. of your 
last package. 
I. ‘AGROSTIS erect. 6 feet high” It appears to be A. sobolifera, 
though I never saw that species so tall. 
‘Poa. Beth.” This, if not a var. of P. nervata, is new to me. 
. “ Festuca diandra” is F. nutans of my book, & of Muhl. herb™. 
It differs some from Fest. 
“Rhynchospora nigra.” Not in my book. Iam not yet satis- 
fied whether it is new or not. 
. Cyperus virens. Think you this sufficiently distinct from 
C. parviflorus? 
“Sisyrinchium anceps aut Bermud.” This differs a little 
from my anceps but is very distinct from my mucronatum, 
of which I can probably send you a specimen. I have a 
very narrow-leaved kind collected by Delile in Georgia. 
What can it be? 
“Cyperus vegetus.” New to me, but you are probably right. 
punctatus Ell. very acceptable—as well as 9. Rhynch. 
cymosa from Beth. 
Dulichium canadense: Surely not distinct from D. spathaceum. 
wo 
+ 
ul 
ys 
td 
e 
2 
