
          soon put a stop to the marches of military forces in
Mexico, but as long as our troops are there, [crossed out: the] science
may as well profit by them.

Does Dr Halsted pay any attention to Cacti?
I wish he would improve his opportunities by directing his
observations to their growth, flowering, fructification etc.

Lindheimer has again sent a collection of interesting
plants from Northwestern Texas, the {?granitic] region
of the upper Colorado. It is remarkable that a number
of his plants are identical with New Mexican species
and [?] more and more from the vegetation of this
gulf coast. He has also sent two Cacti, which
I consider new, which I at least had not seen before,
an Opuntia and another "Echinocereus".

I remain, Dear Sir, very truly

yours

G Engelmann

        