THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 151 
plants from the West Indies. These were collected twelve or 
fourteen years ago by a Frenchman by the name of Perrin. He 
brought his unnamed specimens to this city where he died. Dr. 
Hosack purchased the collection of his wife & after passing 
through various hands part of them have come to me. The 
rest I hope to get ere long. Duplicates of my specimens I sent to 
Sprengel which he determined and sent me a catalogue of. The 
names on the specimens I send you are such as he has given. 
II. Plants collected by Nuttall on the Arkansas & Red Rivers in 
1819 & 1820. I mentioned to you in a former letter of his being 
engaged in writing a Flora [54] of the Country he visited. It will] 
soon be finished, & you will then find all the plants described which 
I send you. He had not given all of them names when he presented 
me with specimens. The Marsilea, Pilularia & Cheilanthes I 
hope will please you*— 
Ill. The North American Cryptogamia are only occasionally 
named, & I shall be exceedingly obliged to you for the names of all 
you are acquainted with or which you can determine without much 
trouble. Pray don’t get out of patience with me for I am ‘con- 
scious I am unreasonable in asking so much. There is a fungus on 
the Acer rubrum of which I have put up a specimen, which I can- 
not determine. Do let [here are inserted the lists mentioned, 
138 names] me know its name as soon as possible. The genus is 
certainly not in Persoon [59]. 
IV. The few Algae are duplicates from a collection sent me by 
Agardh & are named according to his works. Gymnostomum 
Donianum & Orthotrichum Lyellii are two rare Scotch mosses.— 
Have you Tayloria splachnoides of Hook. in Brande’s Journal [62] 
[of Science and the Arts]. I can spare youaspecimen. It is the 
Hookeria splachnoides of Schwagrichen. 
V. The Phaenogamous plants are principally from the northern 
States, with the exception of a few collected by Prof. Douglass in 
the late expedition of Gov. Cass to the sources of the Mississippi. 
The whole collection was presented to me & a catalogue of it 
` will appear in the next N[umber of Silliman’s*] Journal [go]. 
VI. As you mentioned you wished to obtain Agardh’s Species 
Algarum [3] I take the liberty of sending a copy. Perhaps you 
* [Words supplied by the editors, the letter being torn.] 
