Ree. Frankfurt 
Feb. 2 
Pop-Deldorf er Castle, Bonn' 
^ January 21.1857 
Möst Honored Sir Doctor ! 
Many thanks f or the kind coramunicatiorr about Elodea canaderi- 
sis' and Nelumbiuiir' luteuiTe. The reports, which you give me now about 
E lodea't , agree to a major part with those you made earlier in Bonnr,, 
only, that you mention a fe\T more points*. That the pollen is 
is most surprising. pollen does not appear inr re- 
lated plants according to my knowledge: : Hydrilla''- verticillata (the 
one in East Indies) * Lagorsiphon^ musicides (Cape of Good Hope)i, 
Elodea guianensis (in South America) Elodea densa (Egaria densa 
Olreich (also in South America) »all have ball-shaped, one-celled:,,f lat 
kernel TAj\th extremely fine pointlets or spinelets all over, I can on- 
ly think, that Elodea canadensis seems to show pollen 
grains on very young f lowers, who' se pollen development has not been 
fully progressed«. 
If you think it worth your efforts, you will find at Braun myr 
manuscript' of the plants, which describes the plants, which I was able 
to examine». 
There are enough questions concerning^ Elodea, and I shall make 
use of your kind off er to^turn for this to your cousin, and would 
have much earlier, years ago,,turned to youv if I had not feared? to 
be a bother to you,, 
You will See Braun soom How much I reprret not to be also in- 
Berlin- to talk and to listen to you^. 
Again my best thanks, Your most devoted R.Caspary 
Still more ! I recommend to you much the lithographer Renbke in- 
Berlin, Leipziger Platz Nov, X, Everybody knows him there; he is 
very skilled and eager to serve. Greet him best from me. He will 
be much inclined to report to you much useful' about Berlin.. He 
is much better than-Kenny and Cohen. Braun, however, had once a 
not too pleasant experience with hinr.. 
(translated from German Script by Edgar Denison, August 1988 ) 
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