
          If the distinguishing characters, as stated by us in [Silliman's?]
 Journal, will not establish a species, - I really think
 there ought to be a reduction of 20 or 30 per cent of all
 the present species in the Books.  As to the Cardamine
 rotundifolia, said to have been found by Dr. Bigelow on
 the mountains of New Hampshire, I am assured by Dr.
 Pickering it is nothing but the C. bellidifolia.  This
 he told me, since my notice was published in Silliman's
 I should like to see the question settled: & with that
 view, I sent specimens last spring, to Dr. Hooker.
 I hope to hear from him before a great while.
 I wish you would put up for me a specimen
 of C. douglasii - and also a good specimen of
 C. virginia, which I spoke for in 1827.  Indeed,
 I should be happy to have a specimen of any
 duplicates you may have to spare, of any plants
 ennumerated in the list of Desiderata, sent to you
 some time ago.  We have nearly exhausted this
 region, I believe; & I do not get time to visit
 their quarters - as that our present acquirements
 are very trifling. - I suppose you have received De-
 Candolles's 4th volume of the Prodromus - containing
 Umbellifera, Rubiaceae, etc.  What a work it is
 going to be for a Prodromus! It is almost discou-
 raging to a learner, to see such a flood of new names,
 & terms in the modern books.  I am afraid I am too
 old even to learn them.


      I was interested with the new plant [(Trellia) ?]des:
 cribed by Dr. Leavenworth.  He seems to have examined
 it very carefully - & has doubtless established a good genus.
 By the way, does Dr. L. reside in Georgia? I should
 like to correspond with such a man, in the South.

        