e 3 
came above water in 1856 (Note: The year must be wrong, as "last vear" 
was 1865, E.D.),they vegzetated well, but have disappeared since; now, 
only a few a erowine below water in that place until they can re-Co- 
lonize themselves. Could'nt Tuckermani, if it really was something 
special, perhaps hadebeen lost ? 
Now I examined macrospora and find, that there are two identical 
specimens deposited in the Philsdelphia Academy Herbarium, where con- 
fusion reigns frequently. The one, which Durien had, the original of 
his macrospora from the Catskill mountains of New York, the second 
from "Bethlehem". Both are entirely identical, collected at the sane 
time and place. But who ? There is no certainty until the plant will 
be found again. I may perhaps get permission to send the one speci- 
men to you. You will find then, that it is very close to lacustris , 
but different throush a larger velum and smaller microspores, that 1s, 
o5ittovt 
it takes the RZ: does Braunii with echinospora. 
What is your reaction to the canadian Isoetes, of which I sent you 
all I had ? 
Further I examined also Il. opaca and find to my astonishment, that 
contrary to the description by Duvier,the plantlet is fertile but too 
young. Copious stomata. Spores still small (0.25-0.35 mm diameter) 
and the surface not marked very distinctly. I find two items, which 
I ask you to explain to me or correct: 1) the velum covers the entire 
sporaneium just like with I. Durieni 2) the sporansium is compactliy 
thick parenchyma,making it impossible to differentiate layers of 
cells; it is not so younes, that this youth could explain the situation. 
is thespecimen of Geyer more advanced ? 
T have for 4 - 6 weeks a number of live Isoetes,which I would like 
to ship to you. Mailine from here istoo riscy, they may be travelling 
for months before they arrive in Berlin. The postal service here is 
very good and we can mail such items for 2 cemts for % ounces as long 
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