Ban 
erom in very deep water ? Everything seens to point to it, if 
it can be proven, that the depth of the water has an influence on 
the lensth of the leaves on one side and the strength of the vas- 
cular bundles on the other, and further influences the size of the 
spores. 
I am glad I saw correct concerrine the velum with this one 
® 
and with Nuttal; ; but the very young spores of the Nuttalli were 
only 0.25-0.37 mm. 
For I.californica ( which can I then attribute to Bolander) 
I find the microspores more brown then the bast (which in Cubana, 
that I have here, I would like to attribute to fermentat} 
I 
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je) 
O 
u 
er 
es 
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determinating plant) for no. 5080 they are 0.027-0.030 mm of the 
loneer diameter; and fairly smooth. For No. 5093 0.027-0.031 very 
sliehtly hilly.- for no. 5091 spiny-hilly abd in length-cross - 
section 0.026-0.031.- for pygmaea I find them a little smaller 
0.026-0.029 and very weakly spiny. 5091 has almost smooth macro - 
spores,0.32-0.44 mm, very weakly hilly on the underside-ball-like. 
5093 has them somewhat more hilly 0.35 -0.41. 5080 has stronely 
hilly. often confluenting,forming ridzes,size 0.38-0.46. the 
pysmaea I find 0.38-0.47,also a little larrer tahn those 
from California. 
June 18. 
No excuse, t"at the letter has been lying so long. Dr. Parry, the 
was to in 
restless one, whof barticipate | an expedition to the Pacific Ocean, 
was for a few days our guest „ All kinds of delays deferred the 
departure of the expedition, and kept him staying with us for 3 
weeks. That took a lot of my time and Muse. Then other event occ- 
ured and the entire correspondence came to a stand-still. 
In the meantime Lrreceived your letter of April 19 and also 
a copy of Gray's book, meaning,the sheet containinz the Junci 
8 9 10 MISSOURI 
j BOTANICAL 
copyright reserved GARDEN 
