
          By the way, how shall we distinguish Eupatorium 
purpureum & verticillatum. for I often find them 
with 3 to 6 or 7 leaves in a whorl, & with solid or hollow
stem without any respect to the number of leaves, & 
their shape so much a like that I can not distinguish
them. Oenothera pumila answers Bigelow's description
well, & will not agree to O. chrysantha, because
the [leaves] of calyx are shorter than the tube. I have
examined very many. Perhaps an early stage of the 
flowering should be taken. [Four?] years ago there came 
up near me Eaton's [?] impudicus. The next 
year none came up - but a year later they came 
again. The year after there was none. If they come 
again next year, would it be probable they [?] can
not vegetate in one year after the plant dies?

Oct. 21. I have just returned from a high hill. I found 
one or two lichens which I will send you. Perhaps I have
sent one of them. The bush on which one grows, is, I
think, Thalmia [Thalamia?] angustifolia; if not, it is a Vaccinium.
I was not particular to observe which of the two - for both
were growing together. The others grew on the ground.

When I have put the name of some Botanist on a 
label, I mean only the discription of that author, whether
he named the plant or not.

I have today put 
up some minerals for you. Have you phosphate of iron?
Please to tell me what I can send you. Prof. Thellogg's [Kellog's?]
health has been poor this summer, & in his [?] he 
has picked up many of our new ones.

With much respect, Yours obdtly [obediently]

Chester Dewey

Dr. J. Torrey.
        