St. Louis, May 1,1867 
Dear Braun 
Well, the war-scare is at an end;already day before yester- 
day we heard about it by telegrapg. I am really happy for you. 
ARE Be 
Und the the box from Wrisht did arrive,but the books 1\lying 
at the bottom were badly damared. Nothinz serious happened to the Iso- 
etes, and here you received the smaller of the specimens sent to me 
by Gray. Isoetes cubana „ as I call her, is 3-lobed,very distinctly 
visible on the one sent here, less so to see on ny specimen and ap- 
pears in every kind to be an interesting plant,and ven/closely rela- 
ted to I. coromendeliua at least with the plant of Griffith; ex - 
cept for the larzer spores and only 3% vascular bundles nearly impos- 
sible to distinguish. My Cuban type has normally 6 very strong,per- 
ipheral vascular bundles ! which by their structure present them - 
setlves easily as separate strands.- Spiral cells in the central bun- 
dle hardly noticable, which in Enzelmanni are very strong as well 
as in the wood-cells of these plants,which I examined freshly - 
now, no separation of the bark (?) ER from last year/as yet | 
I.cubana has a multitude of stomata,flat-like microspores 
0.023 - 0.031 mm long, macrospores 0.31 - 0.42 mm thick ard rough, 
the lasts strangely sharp end deeply limited, the ligulum broad, but 
very short, blunted ( no septum ?),velum very small; no brown cells 
of the sporanzeium. The larze specimen has about 28 leaves 35-39 cn 
long, maximum diameter 2 mn. 
I have now found stomata also in IlIsoetes califorrica, a 
name it may keep, as it should probably be separated from pyzmaea . 
But despite all efforts I did not succeed to see any in Tuckermanri; 
I examined leaves of all my specimers,. 
Iodine was rarely of help. alcohol never, most helpful was 
pootassium (potash)- hey 
| potash); if they are present they are found best without 
6 7 8 9 10 MISSOURI 
BOTANICAL 
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