was affixed under false premises, namely that Schwinly had collec- 
ted them near his home place. I also examined the specimen from Un- 
bridge;It has no spforansium and the spores of lacustris macrospora. 
I also found remarkable wvariation in the size of the spores in the 
europaean form of lacustris,however never reachine the size of the 
american var. macrospora.Further investiration will probably show, + 
that this difference in size is so strong and tied to the 2 cell 
parts, as it appears now. 
What you write about the Isiotes in the herbarium of Gray is 
very important to me.These are two different ones,totally unknom 
to me. I) The Giant Isiotes from Cuba. In connection with this I 
have two reauests 1)Information on the specifie Locality, if this 
is show. The zoolosical museum has a connection in Cuba, a cor- 
responent who'se name I do not know by heart,who has volunteered 
to take on botanical requests. So, please examine the Cuban,give 
him a name and tell me the characteristics. IT) The Isoetes from 
Cap. I wrote earlier to Sonder about Cap- Isoetes,and he assured 
me, that he had never faced one, though he possesses the richest 
collection of Cap plants.What you tell me about the characteristics 
is not quite sufficient. Missing is the velum,notice if the rhizome 
contains 2 or 3 grooves, I assune a 3-grooved species, because all 
species known from North Africa and tropical Africa are 3-erooved. 
Can you possibly provide a small piece of a leaf for examination, 
speclally for the preparation of a crosscut ? 
I perfalderiana Durien is a variety or subspecies of I velata 
and that one,which is submerged. To this species or group of species 
belong I. Boryana dubia Genaeri,loneissima Bory 
Il. from Santaram I named on request by Spruce I. amazorica 
3-croovedi, stomata I vascular bundles ! 
I.eriffita Eastindia is a species related to I.coromandelica 
if not an identical form 
7 8 9 10 MIıSSOURI 
BOTANICAL 
eloJe)gtelaimc-ti-1a//-Te GARDEN 
