is 
10. Asplenium ebeneum Ait. Rob. p. 
11. Eguisetum prealtum Raf. N. Sp. ? Caulibus sif&- 
plicibus erectis scabris fistulosis : vaginis nigre» 
scens, crenulatis, corona emulans—Prele. Rob. p* 
330. A large specie akin to E. hyemale, grows 
on the banksjof the Mississippi* in large bushes ris¬ 
ing about six feet; the stems are as thick as the 
linger : the cattle are fond of it in winter* and the 
joiners employ it to polish wood. 
Order vi.—Nayades. 
12. Hippuris polyphylla Raf. Caulibus erectis, emei> 
sis foliis 10“ 12 nis, linearibus; floribus sessiii- 
bus axillaris Raf.—Pesse commune Rob. 330. 
Common in smooth waters : stem rising nearly 
a foot above the surface* 
23. Chara, 1 
14. Myriophyilum* I 
!5. Potamogeton, > Several s P ecies - Rob P- 33 ®* 
46, Lemna* I 
\ 
