“ 2 = 
compassing publication later; but, let it be; My labor was, in'the 
beseinning at least, not planned for publication.; only after the ob- 
servations accumulated and so much new was found did I believe, that 
something valuable could be presented to the botanical public and, 
at the same time, our transactions could be made more interesting. 
In the 3rd edition of Gray's Manual 1867 I have 2 Chapters. 
I. Submersae, mostly without stomata | 
1.I.lacustris Lin Form macrospora (I.macrospora Dur) 
2.1.Tuckermani A.Braun in litt 
3. I,echinospora Dur. The normal form only in Europe,distingu- 
ished by a small velum and larger microspores. All american 
forms have broader velums, smaller microspores and more often 
few stomata. They differ from Braunii (I.Braunii Dur.) ‚from 
muricata (I.muricata,Dien) by longer,greener leaves andblunt,. 
short tips of spores.. from Boottii(I.Boottii Braun & Coffey) 
II, ÖOmersae, all with stomata 
I. saccharata Engeln. 
h, 
5. I. riparia Engelm. 
6. I. Engelmanri Braun 
var. gracilis from New Eneland 
ver, valida with broad stalk and keeled leaf 
| 
s 
IH 
© 
melanopoda Gey 
In a note is added, that there are 2 more species in the 
southern United States: I. florida Shott and I.Chapmani Eng. and 
three in the pacific states: I.Nuttal!i Braun, I. Californica Eng. 
and I.pygmaea Eng. „ thus the numbef of american species comes now 
to exactly 12. 
I shall write to Gray, that Braunii should become ambircua 
if there is still time, and that he should add, that a few stomata 
wost\y 
can be foundlonly at the tips of the ee) 
7 8 9 10 MISSOURI 
| | BOTANICAL 
copyright reserved GARDEN 
