7. N. gracillima Northamerica. Appeararce as for tenuis ( not 
‚dichotomus as with minor) Leaves not bent backward, about 2 
cm long,very small (0.18 - 0.25 mm broad) ,with 10 - 12 teeth 
(for the one from Albany, 6 - 8 for the one from Missouri) ‚which 
beein only hish up on the leaf,pointed forward,smaller and 
shorter than the precedinz one,weakly upholstered, i.e. only 
one broad cell removed from the rim of the leaf, 
Note at left of sketch: " thus, only hisher * 
- at riecht w : *% drawn too much deflected" 20 
Sheath pale, almost hyalin-like, protruding a little,enforced, 
sliehtly slit at the upper rim, with 5 - 6 teeth or either side; 
Fruit in size and form as the preceding. I find at least 30, but 
probably more rows od longish indentations,. 
Corresponds thus very closely with tenuis,distinguished by smaller. 
less protruging serration andklightly protruding ears of the sheath., 
The fruit coreesponds,. 
8. N tenuissima (minor v.venuiss, in Leem.Journ.) but defiritle 
celand 
different from minor ! Finland and Bellemd.Appvearance as with the 
?°( this ? is in the original text,E.D.) pr&öceding,also as small- 
leaved, 6 -— 8 teeth on either side similar to No. 7; ears of sheath 
short.fewer teeth; fruit smooth ! ( Of course I have seen only 
a few ripe or almost ripe fruit,which however did not show a siegen 
of plates of alveoli]. 
Based on this you may now cogitate and choose, if gracilis 
is a species or a variety of tenuis or if you want to regard it 
with that as a variety of indica. N.tenuissima I will try to ob- 
tain more from Finland in order to see if the differerce in the 
fruit becomes established. 
"Both the Algae, which you sent recently to your George,are 
1) from the Sangamon River,Illinois (Hall) is Thorea ramosissima 
MERzZeiN 
| BOTANICAL 
cm eloJejiglelaim d=t:-1077-Te GARDEN 
BE BE EEE EEE EEE EEE 
Ö 1 2 3 A 9 6 1 5 a 1? 
