355 Commonwealth Avenue, Boston, Mass, 
lovember 28th, 1921. 
My dear Dr. Standley; 
With regard to economic 
specimens all that it is necessary for you to 
know ia that I like to be able to refer back 
to the source plants the common useful plants 
that one meets with in the tropies. I also like 
to have specimens of the raw products that occur 
in the shops and markets, with herbarium material 
of the species that yield them. When Dr. Maxon 
went to Jamaica a few years ago he collected 
material for me and my letters to him will prob¬ 
ably give you an idea of what I want if this 
letter fails to do so. 
I am preparing drawings of 
the more common species from Central America. It 
hurts to do this because so many of them have 
been figured before. But I suppose what you want 
is a reference flora and in that case it will be 
necessary to put stress on the species that one 
meets in the work of the day. I shall get some of 
the unfigured species in, however, as I am sure 
