
          Recd. Dec 31st                                                                              Philad. Dec 29th 1836
And. Apr. 19th

Dear Sir,
Having an opportunity of sending by Dr.
Carson I trasmit some specimens of a [Teispus?] avout which
I wrote formerly, as being identical (so far as my memory serves
without reference to the Herbarium) with the "I * alatus" of Nutt
just above the city, and to different in habit from J. triquetes
that I took it for J. lacustris till undeceived by its triangular
stem- the leaves were only produced near the base of the stem &
were not visible tell the plant was uprooted. It seems subaquatie
if not fairly an aquatie species, & grew in company with J. lacustris.
-This tide fresh-water in the Delaware is rather a peculiar situation
& these are other plants growing within its reach which
require investigation.
I have received three copies of the Monograph, one
for Nuttall, one for the [head?] of the other for myself-you ask
my opinion respecting the work, but I should not feel competent
to give one unless I had studied the Family. I may however
remark that I think the style in which your Monograph [?] got
up, as well as that of Dr. G's on Rhynchosphora, will prove an epoch
in the manner of studying our plants.- I was also much pleased
with your rejecting the doubtful species into an appendix.-I cannot
help thinking however that as this is a great country for rains,
rivers, & marshes, for Unios, Water Tortoises & Salamanders, and as a majority
of the Cyperacaea seem to be more peculiarly attached to moist 
places, together with what I have seen myself, the species will turn
out more numerous here than almost any where else-perhaps

        