﻿INDEX 
  

  

  3(J7 
  

  

  Summer-deciduous 
  trees 
  and 
  shrubs, 
  

   77-79 
  

  

  Sundew, 
  53*, 
  54 
  

  

  Sunflower 
  stem, 
  cross 
  section 
  of, 
  02*, 
  

   63 
  

  

  Superior 
  ovary, 
  132 
  

  

  Suspensor 
  cells, 
  303* 
  

  

  Swamp 
  lands, 
  321 
  

  

  Sweet 
  potato, 
  sprouting 
  of, 
  32* 
  

  

  Switch 
  plants, 
  50*, 
  57 
  

  

  Sycamore 
  fruits, 
  108* 
  

  

  Sycamore 
  log, 
  111* 
  

  

  Symbiotic, 
  saprophytes, 
  52 
  

  

  Symmetry, 
  129 
  

  

  Sympetalous, 
  128 
  

  

  Synergids, 
  300, 
  301* 
  

  

  Synsepalous, 
  128 
  

  

  Syringa 
  (Fhiladelplms) 
  leaves, 
  ar- 
  

   rangement 
  of, 
  71* 
  

  

  Systematic 
  botany, 
  197 
  

  

  Taxodium, 
  26* 
  

  

  Taxonomy, 
  definition 
  of, 
  197 
  

  

  Teleutospores, 
  254, 
  255* 
  

  

  Temperature 
  and 
  germination, 
  101 
  

  

  Tendril, 
  75*, 
  76* 
  

  

  Tendril 
  climbers, 
  74*, 
  75*, 
  76* 
  

  

  Terminal 
  bud, 
  95* 
  

  

  Testa, 
  158* 
  

  

  Thallophytes,classification 
  of, 
  260,261 
  

  

  Thallophytes, 
  in 
  relation 
  to 
  evolution 
  

  

  of 
  plants. 
  305 
  

  

  Thickening 
  of 
  stems, 
  12*, 
  66, 
  67 
  

   Thistle, 
  Russian, 
  167, 
  168 
  

   Thorn 
  tree, 
  bud 
  section 
  of, 
  100* 
  

   Thuja, 
  293*, 
  294 
  

   Tillandsia. 
  See 
  Spanish 
  moss 
  

   Timber, 
  *107-110 
  

   Timber 
  supply, 
  112 
  

   Timothy, 
  pistil 
  of, 
  139* 
  

   Timothy, 
  variation 
  in, 
  174, 
  175* 
  

   Tolerant 
  and 
  intolerant 
  trees, 
  113 
  

   Toxins, 
  212 
  

   Tracheids, 
  109 
  

   Transpiration, 
  22, 
  23, 
  79-83 
  

   Transportation 
  of 
  foods, 
  40, 
  42, 
  43 
  

   Tree 
  ferns, 
  270 
  

   Tree-growing, 
  *1 
  14-1 
  18 
  

   Trees, 
  12, 
  43, 
  44, 
  60, 
  61, 
  66, 
  67,78, 
  79, 
  

  

  97*, 
  98*. 
  See 
  also 
  Forestry 
  

   Tube 
  nucleus, 
  135* 
  

   Tuber, 
  87*, 
  88* 
  

   Tubercles 
  on 
  roots, 
  *204-207 
  

   Tuberculosis, 
  213-215 
  

   Tumbleweeds, 
  337*, 
  339 
  

  

  Turgidity, 
  23 
  

   Turgor, 
  22 
  

   Turpentine, 
  297 
  

   Twigs, 
  fall 
  of, 
  77-79 
  

   Twiners, 
  74*, 
  75* 
  

   Typhoid, 
  215, 
  216 
  

  

  Underground 
  stems, 
  *86~90 
  

   Unisexual 
  flowers, 
  127* 
  

   Unit 
  characters, 
  174 
  

   Uredospores, 
  254, 
  255* 
  

   Usnea, 
  249*, 
  261 
  

   Ustilago, 
  252*, 
  253, 
  261 
  

  

  Variation, 
  173 
  

  

  Variety, 
  173 
  

  

  Vaucheria, 
  *226-228, 
  260, 
  264 
  

  

  Vegetative 
  reproduction, 
  *87-93, 
  

  

  220-222 
  

   Vein, 
  69*, 
  70* 
  

   Venus's-flytrap, 
  54 
  

   Vernation, 
  271, 
  *273 
  

   Vessel, 
  64 
  

  

  Violets, 
  cleistogamous 
  flowers 
  of, 
  141* 
  

   Virginia, 
  creeper, 
  76* 
  

  

  W 
  ater, 
  absorption 
  of 
  , 
  by 
  roots,9,10,24 
  

  

  Water, 
  movement 
  of, 
  37, 
  42 
  

  

  Water, 
  pressure 
  of, 
  24 
  

  

  Water 
  lily, 
  flower 
  of, 
  78* 
  

  

  Water 
  plants, 
  29*, 
  78* 
  

  

  Water 
  plants, 
  leaves 
  of, 
  78*, 
  79, 
  81 
  

  

  Water 
  pollination, 
  139 
  

  

  Water 
  roots, 
  29 
  

  

  Water 
  storage, 
  *80~83 
  

  

  Water 
  supply, 
  209, 
  217 
  

  

  Water 
  supply 
  and 
  leaf 
  structure, 
  81, 
  

  

  82 
  

  

  Water 
  supply 
  in 
  soils, 
  321-323 
  

   Weeds, 
  *333-342 
  

  

  Weeds, 
  injuries 
  caused 
  by, 
  *335-337 
  

   Weeds, 
  origin 
  of, 
  337 
  

   Weeds, 
  prevention 
  of, 
  338 
  

   Weeds, 
  success 
  of, 
  333, 
  334 
  

   Wheat 
  breeding, 
  *1 
  77-181 
  

   Wheat 
  rust, 
  *254~256 
  

   White 
  pine, 
  283* 
  

   Williams, 
  C. 
  G., 
  186 
  

   Willow, 
  flowers 
  of 
  , 
  127* 
  

   Willow, 
  mots 
  of, 
  29 
  

   Willow 
  cutting, 
  90* 
  

   Wilting, 
  9, 
  23* 
  

   Wind 
  pollination, 
  139 
  

   Windbreaks, 
  *115-118 
  

   Windstorms, 
  destruction 
  by, 
  61* 
  

  

  