Desr Braun; 
You are being really bombarded with letters I It is'nt a week yet 
(Note 1), that you received throush Buchanen in Bremen a letter and,hore- 
fully, a package of Isoetes and a little box with live Isoetes; and here 
comes still another. 
Ihe enclosed specimen belongs to Gerber of the Philadelphia Acade- 
my, and is marked, "near Bethlehem", namely in Pennsylvania. But I find 
it in every way,even as the size........ etc identical to the Catskill 
Mountains specimen, which is in the same herbarium,and which is the ori- 
ginal of Isoetes macrospora of Durien. I have no doubt that both were 
more Life 
collected in the same place and at the same time, pmobsbLy' on the Cats- 
kill DIE ear Bethlehem. I obtained permission to send you this 
specimen as a loan, and to ask you at the same time to return the Phila- 
Gelphia Charae with this Isoetes.with your identification. 
I find Isoetes lacustris from America always with larser spores 
than the hungarian; but the two from Echolake and Sault Ste lsarie have 
smaller,sickle-shaped velum and larre microspores entirely like the 
europaean form; in contrast the two Philadelphia specimens, the origi- 
nal of I. macrospora as well as the one sent here,the so-called Bethle- 
mem, one the one hand the same very large macrospores,but on the other 
smaller microspores and a broader velum. 
Macrospores Microspores 
I.lacustris europaea 0.56-0.65 mm 0.039-0.041 mm 
americana 0.67-0.80 0.039-0.040 
macrospora 0.67-0.81 0.034-0.038 
You are familiar with the one mailed to you recently from Sault 
Ste llarie ( my specimen, given you 1857 from Echolake seems t0 be sterile) 
and the second throush the herewith enclosed specimen. What is your re - 
action ? 
There was great disorder in the Philadelphia herhbarium as unaualified 
people seem to have caused all kinds of confuslon; Was, thus I find 
9 MISSOURI 
. BOTANICAL 
copyright reserved GARDEN 
