ANATOMY 



387 



FlCi. 211. 



A, transverse section of the stem of Equisetum palustre (X26), and B, part of it 

 X 160. C, transverse section of the rhizome of Eqnis. sylvaticum ( X 26), and D, 

 part of it X 160. E, transverse section of the rhizome of Equis. litorale ( X 26), and f, 

 part of it x 160. cc central cavity. r = valleculai canals. t- = carinal canals. i = sheath 

 of separate strands, as outer, is = inner general endodermis : in A, C, and E the endo- 

 dermis is indicated by a dotted line. (After Pfitzer.) From Rab. Krypt. Flora. 



