﻿INTRODUCTION 
  TO 
  BOTANY 
  

  

  ax- 
  

  

  FH;. 
  7'J. 
  

   buds 
  of 
  box 
  uldur 
  

  

  A, 
  face 
  view 
  of 
  a 
  .sin- 
  

   gle 
  group, 
  with 
  axil- 
  

   lary 
  bud, 
  ax, 
  between 
  

   accessory 
  buds 
  ; 
  B, 
  

   profile 
  view 
  of 
  two 
  

   opposite 
  

  

  The 
  plumule 
  (lig. 
  141) 
  is 
  the 
  first 
  terminal 
  bud 
  of 
  the 
  young 
  

   iner. 
  Commonly 
  the 
  terminal 
  bud 
  is 
  stronger 
  than 
  any 
  of 
  

   the 
  lateral 
  ones, 
  and 
  makes 
  more 
  rapid 
  

   growth 
  than 
  they 
  do. 
  

  

  Lateral 
  buds 
  are 
  usually 
  axillary 
  ; 
  that 
  is, 
  

   they 
  arise 
  from 
  the 
  axil, 
  or 
  angle 
  formed 
  by 
  

   the 
  leaf 
  with 
  the 
  stem, 
  as 
  shown 
  in 
  figure 
  

   77, 
  <u: 
  Many 
  plants 
  also 
  produce 
  accessory 
  

   Ian 
  Is, 
  that 
  is, 
  

   buds 
  a 
  1 
  it 
  t 
  li- 
  

   on 
  t 
  side 
  of 
  the 
  

   leaf 
  axil, 
  which 
  

   may 
  either 
  stand 
  

   above 
  the 
  axil- 
  

   lary 
  bud, 
  as 
  in 
  

   the 
  butternut 
  

  

  (iig. 
  78), 
  or 
  on 
  either 
  side 
  of 
  it, 
  

   as 
  in 
  the 
  box 
  elder 
  (iig. 
  79). 
  

  

  Adventitious 
  l>n<h 
  are 
  those 
  

   which 
  spring, 
  without 
  any 
  deli- 
  

   nit 
  e 
  order, 
  from 
  roots, 
  stems, 
  or 
  

   leaves. 
  These 
  are 
  often 
  of 
  great 
  

   value 
  in 
  propagating 
  plants 
  bv 
  

   means 
  of 
  cuttings 
  or 
  layers. 
  

  

  91. 
  Bud 
  position 
  and 
  branch- 
  

   ing 
  ; 
  form 
  of 
  trees. 
  Plants 
  with 
  

   alternate 
  leaves 
  bear 
  alternate 
  

   buds, 
  and 
  those 
  with 
  opposite 
  

   leaves 
  bear 
  opposite 
  buds. 
  I 
  !' 
  the 
  

   buds 
  develop 
  into 
  branches, 
  their 
  

   arrangement 
  will 
  of 
  course 
  fol- 
  

   low 
  the 
  plan 
  of 
  the 
  leaf 
  arrange- 
  

   ment. 
  Figures 
  80 
  and 
  81 
  show 
  

   the 
  results 
  of 
  one 
  year's 
  growth 
  

   of 
  twigs 
  from 
  alternate 
  and 
  from 
  opposite 
  buds. 
  Sometimes 
  

   ( 
  lig. 
  81) 
  the 
  branch 
  is 
  terminated 
  by 
  a 
  flower 
  cluster. 
  In 
  this 
  

  

  Fio. 
  80. 
  Alternate 
  branching 
  

  

  in 
  seedling 
  tree 
  of 
  cultivated 
  

  

  crab 
  apple 
  

  

  