﻿FLOWERS 
  

  

  127 
  

  

  FIG. 
  104. 
  Flower 
  of 
  

  

  lizard's-tail, 
  with 
  no 
  

  

  calyx 
  or 
  corolla 
  

  

  After 
  Eugler 
  

  

  adjacent 
  cycles; 
  that 
  is, 
  each 
  petal 
  opposite 
  a 
  space 
  between 
  

  

  two 
  sepals, 
  each 
  stamen 
  opposite 
  a 
  space 
  between 
  two 
  petals, 
  

  

  and 
  so 
  on. 
  Very 
  often 
  this 
  alternate 
  ar- 
  

   rangement 
  of 
  the 
  members 
  of 
  successive 
  

   whorls 
  is 
  less 
  evident 
  beoause 
  one 
  or 
  more 
  

   whorls 
  have 
  more 
  numerous 
  or 
  fewer 
  parts 
  

   than 
  the 
  others, 
  as 
  in 
  the 
  case 
  of 
  the 
  butter- 
  

   cups 
  and 
  crowfoots 
  (fig. 
  103), 
  roses, 
  and 
  

   many 
  other 
  familiar 
  flowers. 
  In 
  many 
  

   cases, 
  as 
  in 
  the 
  knotgrass 
  (fig. 
  125), 
  only 
  

   one 
  set 
  of 
  floral 
  leaves 
  occurs. 
  Such 
  flow- 
  

   ers 
  are 
  said 
  to 
  lack 
  petals 
  and 
  are 
  known 
  as 
  

  

  apetalous. 
  Some 
  flowers, 
  as 
  those 
  of 
  the 
  lizard's-tail 
  (fig. 
  104) 
  

  

  and 
  the 
  willow 
  (fig. 
  105), 
  

  

  are 
  wholly 
  destitute 
  of 
  

  

  calyx 
  and 
  corolla. 
  

  

  117. 
  Staminate 
  flow- 
  

   ers 
  and 
  pistillate 
  flowers. 
  

  

  Such 
  flowers 
  as 
  are 
  shown 
  

  

  in 
  figures 
  101-104, 
  con- 
  

   taining 
  both 
  stamens 
  and 
  

  

  pistils, 
  are 
  said 
  to 
  be 
  

  

  bisexual. 
  1 
  Those 
  which 
  

  

  contain 
  stamens 
  but 
  not 
  

  

  pistils 
  or 
  pistils 
  but 
  not 
  

  

  stamens, 
  like 
  those 
  of 
  the 
  

  

  willow 
  (fig. 
  105), 
  are 
  said 
  

  

  to 
  be 
  unisexual. 
  Many 
  

  

  families 
  of 
  dicotyledon- 
  FlG 
  1Q5 
  Dioecious 
  flowers 
  of 
  white 
  willow 
  

  

  ous 
  trees 
  and 
  shrubs, 
  (Salix 
  aWa) 
  

  

  such 
  as 
  the 
  Willow 
  fain- 
  A, 
  staminate 
  catkin, 
  natural 
  size; 
  B, 
  pistillate 
  

  

  ily, 
  the 
  Oak 
  family, 
  and 
  ca 
  t 
  ki 
  , 
  n 
  ' 
  n 
  j 
  ? 
  tu 
  ;.f 
  1 
  ze 
  t 
  ; 
  staminate 
  fl 
  wer 
  ' 
  ni 
  f 
  ' 
  

  

  / 
  iiined 
  ; 
  D, 
  pistillate 
  flower, 
  magnified. 
  After 
  

  

  Others, 
  have 
  unisexual 
  Cosson 
  and 
  De 
  Saint-Pierre 
  

  

  1 
  The 
  flower 
  itself 
  is 
  not 
  sexual 
  at 
  all, 
  as 
  will 
  appear 
  later, 
  but 
  these 
  

   terms 
  have 
  come 
  into 
  general 
  use, 
  and 
  their 
  application 
  to 
  the 
  two 
  kinds 
  of 
  

   flower 
  seems 
  likely 
  to 
  continue 
  

  

  B 
  

  

  D 
  

  

  