ANATOMY 



187 



.-I, uans\<.-r>e section of the stem of Eqaisetttnt palustre (X26), and B, part of it 

 X 160. C, transverse section of the rhizome of Equis. sylvaticuin (X26), and />, 

 part of it x 160. , transverse section of the rhizome of ynis. litorale (X26), and f, 

 part of it X 160. or = central cavity. r' = valleculai canals. <- = c:irinal canals. ^ = sheath 

 of separate strands. rt,t = outer, ;'.v = inner general endodermis : in A, C, and E the endo- 

 dermis is indicated by a dotted line. (After PfiUer.) From kali. Krypt. Flora. 



