& au z 
411 Mountains in New York,the locality of the lone specimen of Du - 
rien's microspora; and today came from Delaware I. riparia and Engel- 
manni; from laryland a little dwarf,which porved to be a new species; 
and for tomorrow the large, new one from Delaware has been announced, 
of which I wrote to you already and drew it. Thus: The plant of Tucker- 
man and muricata Gezay has sent to you live already I assume,collected 
with those I received.I see, that I sent you muricate without a name 
nn 
nn en 
some time back; half a specimen, (all I had),marked"from Woburn". 
Yı aeg 
Tuckerman's plant is however the same as mine from Yı9y2 een ar 
the one from Niagara, the one now received from the Catskill and the 
one most generally distributed in the Northeat is Braunii and is dis- 
tinguished from echinospora through the salil,which covers the fova 2733 
Muricata is a good and closely related species with it,with one 
half covered fovea -larser plants verying in spinyness,. 
2) Now the two new ones.Isoetes valida mihi is the largest local 
species,similar to Engelmanni,with keeled leaves 15 - 20 inches long; 
twice already this Summer I had it in my hands, and tomorrow 1 am supposed 
to get ripe specimens.; the keeled leaf easily ’designates it;- I know 
it from Delaware and Pennsylvania. 
Isoetes saccharata is a minute spelcies from the vicinity of Ches- 
apeak Bay,collected in Maryland,close to Braunii,but with a smaller 
sall and finely bumpy spores. 
I cannot find any stomata in muricata,qguite rarely in Braunii,with 
all others they are present,the smallest in lI.melanopoda ard not fre- 
aquent there though this is a half terrestrial plant. I will have to 
examine more closely. 
May-be I'11 write again in a week. I send no drawings todayks I want 
to give a short synopsis of the 10 nörthamerican IlIsoetes,in part to 
describe my new ones, in part in order to present to all who helped 
me so diligently and willingely 
10 MISSOURI 
. BOTANICAL 
copyright reserved GARDEN 
