A. Isoetes without peripheral vascular bundles 
All american are submergzed or aestuariae;there are also 
south-american species (andica) ;all north-american have 
2-zrooved rhizome; There are 3-rrooved species in Tasma- 
nia; all north-american have an incomplete velum, in south- 
and Tasmanria 
america/are some with complete velum (Velum, Mulleri,etec) 
and entirely without velum (Aedina,zunaii,elatior) 
a. without stomata 
1. I. pygmaea 
2. I. lacustris macrospora 
3. I. muriata 
hu. I. echinospora 
b. with very rare stomata 
5. I. (echinospora) ambigua 
c. with many spomata 
5... Bosttit 
7. il. saccharata 
8. I. califorrica 
9, I. Tuckermani 
16: A, riparla 
B. Isoetes with peripheral vascular bundles. All have stomata, 
the northamerican are all 2-grooved,those of the Old World 
3-rrooved. 
Of these the next time more. 
I gereet you and your heartily. Your A.Braun 
(translated from German script by Edgar Denison 
St. Louis, Mo. December 1987) 
* The German word used is "Kneipe" a meeting of students 
of an evening where lonz pipes are smoked and beer flows, 
#%* Braun speaks of "Stacheln" the German word for spines. 
9 MISSOURI 
. BOTANICAL 
eloJe)igte aim c-ti-iat-Te GARDEN 
