
          other private coll. also fragments of the Paris & Berlin
Herbaria, and must work them out. I [?]
distribute Lindheimers older collections, examine his
new ones, those of Fendler as soon as they arrive.
Those of Wislizenus must also be studied.

I have lately paid much attention to Alismaceae
and should like to work this small order out
by the time you come to it; I restitute [?Richards]
Echinodous, and strongly suspect that some european
Alismas (A. ranunculoides e.g.) belong to it; at
all events 3 species that grow here.

Another family in which I take a great interest are
the Cacti, and I am cultivating now probably 30
species of Texas, N. Mexico & U.S. Of course I can
not trouble myself with the cultivation of more southern
plants, but I should like to get a complete
collection of those near us, which for the
most part are new and unknown to gardners
or Botanists. I believe I now also Nuttalls
Mammillaria senilis (from the upper Missouri)
and shall cultivate it, and ascertain [crossed out: its] where it
belongs to. Do you know his Cactus ferox?
joints very large, fruit as large as a hens egg",
"I have one from above, which has small joints
(3 inches long) and small spiny fruits, but may
be the ferox (or O. missouriensis).

If you can help me to increase my coll. of Cactcae
from the boarders of the Rio Grande, Chihuahua
N Mexico, Oregon or California, I should be
very much obliged to you.

M. Wisl. has also sent a Prosopis, similar to yours
& Fremonts P. odorata but very distinct.

I am glad that the Plants of the Exploring Expedition
have finally come into your hands. I shall

        