﻿308 
  

  

  INTRODUCTION 
  TO 
  BOTANY 
  

  

  , 
  tracheids 
  of, 
  10!)* 
  

   Wood 
  libers, 
  04 
  

  

  fruits 
  and 
  seeds, 
  170 
  

   Winter 
  buds, 
  94 
  

   Winter 
  spores 
  of 
  wheat 
  rust, 
  254, 
  Wood 
  sections. 
  05*, 
  109*, 
  110* 
  

  

  255* 
  

  

  Wood, 
  coniferous, 
  108, 
  109* 
  

   Wood, 
  fuel 
  value 
  ..f. 
  108 
  

   Wood, 
  hard, 
  109, 
  1 
  10* 
  

   \Vond. 
  phv>ical 
  properties 
  of, 
  *107- 
  

  

  110 
  

  

  Xerophytes, 
  28, 
  29*, 
  80*, 
  81*, 
  82, 
  83 
  

   Yeast, 
  240* 
  

  

  Zobspores, 
  227* 
  

   Wood, 
  structural 
  advantages 
  of 
  , 
  107, 
  Xyi:<mi<>rphie 
  flowers, 
  128*, 
  129 
  

  

  108 
  

  

  \V 
  1. 
  structure 
  of, 
  62*, 
  63*, 
  05*, 
  

  

  10'J*, 
  110* 
  

  

  Xy-ospore, 
  224*, 
  225, 
  228 
  

  

  