0 
.ber. When new growth befiins in Spring (this year already in late 
Summer) the inner part of the tuber swells, the outer part, or the 
entire old tuber splits at the base, and the new tuber, which forms 
in the middle, parts the two halves of the old tuber to the riesht 
and the top, whereupon the parts rot ( I saw in Fall on one of my 
cultivated plants bese shell-like remains hang from the new tuber) 
like a thick Loose bark). Thus a new tuber is formed for each gene- 
ration of the plant, possibly similar to the appearance of some mo- 
nocotyledons Arisaema, Symplorospus, more so than with cryptogans; 
Life Seneracte into the tuber just like into a seed and this tuber 
lives only until a new plant emerges from it. 
What I wrote ( completely developed specimens,carrying sporeS 
collected during the second half of November) are mostly seed-plants, 
xrown since the beginning of July. You want to know, how I know that? 
Anything green was killed completely during the extraordinary drousht 
of June, wherever the plow togre up the ground. Isoetes could be found 
only on clumps of earth about one half the size of your hand,may-be 
3 inches deep and begin to shave off the lower part. First you will 
not find anything, soon you will reach the ends of roots, and finally,. 
between 1 and 1/3 " from the surface of the top part you will come to 
the tubers in regular? position, showing, that only those spores,which 
were at the same depth from the surface did germinate. It is therefor 
impossible to doubt in the least,that these are all seed-plantsı: "it 
is a fixed fact". The spores germinated much later further down at 
the base of the furrows,because they could not develop in water; 
they began to grow only after the weather had become dry and the water 
in the furrows had evaporated. The specimens,which were fully devel- 
oped at the end of November came all from the elevations and ridges 
which the plow had made, the seedlings are from the deep furrows.. 
1 ER EEE RE DE EEE GE 
4 5:6 7 8 ur 10  MISSOURI 
. | BOTANICAL 
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