﻿T. 
  Holm 
  — 
  Pogonia 
  ophioglossoides. 
  19 
  

  

  Warming, 
  Eug. 
  : 
  Orn 
  Skudbyo-ning, 
  Overvintring 
  og 
  Foryngelse. 
  

  

  (Naturhist 
  For. 
  Festskr. 
  Kjobenhavn, 
  1884, 
  p. 
  36.) 
  

   Wittrock, 
  V. 
  Br. 
  : 
  Orn 
  rotskott 
  hos 
  ortartade 
  vaxter, 
  med. 
  sars- 
  

  

  kild 
  hansyn 
  till 
  deras 
  olika 
  biologiska 
  betydelse. 
  (Botan. 
  

  

  Xotiser 
  Lund., 
  1884, 
  p. 
  21.) 
  

  

  EXPLANATION" 
  OF 
  FIGURES. 
  

  

  Figure 
  1 
  . 
  — 
  Pogonia 
  ophioglossoides. 
  Rhizome 
  showing 
  a 
  root-shoot 
  developed 
  from 
  

   the 
  root 
  R, 
  and 
  a 
  much 
  younger 
  one 
  (S) 
  developed 
  from 
  the 
  root 
  r 
  1 
  ; 
  

   i 
  * 
  = 
  the 
  first 
  internode 
  of 
  the 
  root-shoot; 
  V 
  = 
  the 
  first 
  scale-like 
  leaf 
  ; 
  

   L 
  = 
  the 
  green 
  leaf 
  ; 
  b 
  = 
  the 
  terminal 
  bud 
  of 
  the 
  root-shoot. 
  Natural 
  

   size. 
  

  

  Figure 
  2. 
  — 
  Same 
  species. 
  A 
  similar 
  vegetative, 
  but 
  older 
  root-shoot; 
  r 
  J 
  =the 
  

   first 
  secondary 
  root 
  of 
  the 
  shoot 
  ; 
  r 
  2 
  and 
  r 
  2 
  = 
  a 
  pair 
  of 
  secondary 
  

   roots 
  developed 
  from 
  base 
  of 
  second 
  internode 
  ; 
  r 
  == 
  the 
  secondary 
  

   root 
  from 
  fourth 
  internode; 
  i 
  1 
  -i 
  4 
  = 
  the 
  four 
  internodes 
  of 
  the 
  

   shoot 
  ; 
  L 
  1 
  = 
  scar 
  with 
  fibers 
  left 
  from 
  the 
  first 
  green 
  leaf 
  ; 
  L 
  2 
  = 
  

   petiole 
  of 
  second 
  green 
  leaf; 
  I 
  1 
  and 
  P 
  = 
  scale-like 
  leaves. 
  This 
  

   shoot 
  is 
  developed 
  from 
  apex 
  of 
  root 
  R. 
  Magnified. 
  

  

  Figure 
  3. 
  — 
  Same 
  species. 
  Flower-bearing 
  root-shoot. 
  St. 
  = 
  base 
  of 
  flowering 
  

   stem 
  ; 
  the 
  other 
  letters 
  as 
  above. 
  Magnified. 
  

  

  Figure 
  4. 
  — 
  Pogonia 
  verticillata. 
  Vegetative 
  shoot 
  in 
  its 
  second 
  year, 
  developed 
  

   on 
  a 
  root. 
  St. 
  = 
  the 
  stem, 
  which 
  at 
  its 
  apex 
  bears 
  a 
  whorl 
  of 
  four 
  

   green 
  leaves. 
  Natural 
  size. 
  

  

  