
          Dr. Barton has already anticipated one of my plates,
 ([?] obolaria virginica,) and possibly  [?] the others,
 before I am ready for publication. The others are
 Talinum teretifolium and [Athenopoyor apludoides].
 However, I have now advanced so far, that I shall
 go on, if my health and business will permit.


 The work of De Candolle, which you mention,
 I have never had the pleasure to see and if it be
 to be had in New York, should be greatly obliged if
 you will inform me at what place, so that
 I may procure it forthwith. I have sent by Mr.
 Schweinitz for his Systema regni vegetabilis, so
 as it may be published, but should be very glad
 to get his synopsis, in the mean time, if possible
 Mr. De Candolle informed me, in a letter which
 I received from him near four years ago, that he
 was about to publish a Prodromus of his great 
 work; but our Booksellers in Philadelphia seem to have
 more enterprise in procuring copies of novels
 from the "great unknown", than works on
 Natural Science, and I have therefore never
 been so fortunate as to meet with the Prodromus.
 It will give me great pleasure to
 exchange specimens with you, as far as I
 may have it in my power to furnish you
 with anything new -- though I [?]
 we have very few plants in this vicinity which
 are not familiar to you. If, from your general
 idea of the vegetables of this region, you could
 send me a list of desiderata, which are possibl
 within my reach, I will gladly avail myself
 of the opportunity to render my correspondence
 in some degree acceptable. A great number 
 of Muhlenberg's [Pennsylvania] Plants are not to be
 found here, and are unknown to me, but possibly
 I could help you to some of them, which may not
 be in your Herbarium. I think we can effect
 an interchange of packages through the agency of
 Booksellers, in the two cities of New York and Philadelphia

        