I assume you received the live plants of Isoetes muricata, but 
its leaves have been destroyed, though without doubt the spores are 
arwinanug‘ 
visible, and may-be even "fruirkäing. I enclose some of the plant but 
will ship you soorir honest amount of Isoetes. I. muricata has 
strong, very sngreen leaves without stomata;but on small specimens 
which follow here and which have been grown above water, I did’ find 
stomata on one leaf examined; I certainly do not know, if they ex- 
ist on those included here.- You received from me a year ago plants 
from Niagara,so you can look yourself for stomata - I found them on 
these this vear.-I must continue to assert that they are not of abso- 
lute importance. 
I believelthat echinospora and Braunii, lacustris and macro - 
spora, muricata and Braunii, and Engelmanni and valida may either 
be combined or separated, dependine on one's view of the spores. 
Could the microspores be spiny and smooth on the same spores ?‘ 
Most true specimens of Lngelmanni as well as the local originals have 
ann 
smooth microspores or&fi extremely lishtly bumpy ones, but valida is 
really spiny; I cannot find any other difference with the microspores, 
other than that those of vailda are usually somewhat smaller. 
WER A NLER 
You say in Isoet. Tardia that Dr. Geubel found Isoetes Engel- 
manni with 100 leaves. Who is Dr. Gabel and where did he collect 7 
My largest specimens of validasurpasses all with 190 leaves, may-be 
200 leaves IYou shall have a sketch and a section of it; corm 13 inch 
circumference, tuber 13 inch diameter I For I. riparia I finally saw 
a twin. 3-legged. With valida a curiously elongated,turnip-like 
stem,once or twice formed like the stem,most unreliable. I do not 
enclose any other form of stem, you will receive later a section of 
the others, 
Now enoush about Isoetes !IMore about it when the Californians 
arrive.I am eager to know what you will have to say about Nuttallii, 
9 10 MIıSSOURI 
. | BOTANICAL 
copyright reserved GARDEN 
