﻿INDEX 
  

  

  303 
  

  

  Horse-chestnut 
  buds, 
  102*, 
  103* 
  

   Horticulture, 
  315-319 
  

   Host, 
  49 
  

  

  Hybrid 
  blackberries, 
  190 
  

   Hybrid 
  plum.,, 
  187* 
  

   Hybridizing, 
  *186-190 
  

   Hybrids, 
  * 
  186-1 
  90 
  

   Hydrogen, 
  38, 
  343, 
  344 
  

   Hydrophyllum, 
  125* 
  

   Hydrophytes. 
  See 
  Water 
  plants 
  

   Hypha, 
  236 
  

   Hypocotyl, 
  158*, 
  159* 
  

   Hypogynous, 
  132 
  

  

  Iceland 
  moss, 
  251 
  

  

  Independent 
  plants, 
  48 
  

  

  Indian 
  corn, 
  germination 
  of, 
  18*, 
  

  

  100* 
  

  

  Indian 
  corn, 
  kernel 
  of, 
  17*, 
  183* 
  

   Indian 
  corn, 
  structure 
  of 
  stem 
  of, 
  

  

  11*, 
  68* 
  

  

  Indian 
  pipe, 
  50*, 
  51* 
  

   Indian-corn 
  breeding, 
  *181-186 
  

   Indian-corn 
  culture, 
  182, 
  322 
  

   Indusium, 
  272*, 
  273, 
  276* 
  

   Industries, 
  plant, 
  *308~332. 
  See 
  also 
  

  

  Agriculture, 
  Horticulture, 
  Fuel, 
  

  

  Fibers, 
  Timber 
  

   Inferior 
  ovary, 
  131*, 
  132* 
  

   Insectivorous 
  plants. 
  See 
  Carnivo- 
  

   rous 
  plants 
  

  

  Insect-pollination, 
  139 
  

   Insects, 
  diseases 
  due 
  to, 
  328, 
  330 
  

   Insects, 
  pollen-carrying 
  apparatus 
  

  

  of, 
  146* 
  

  

  Integument 
  5, 
  300, 
  301*, 
  303* 
  

   Intercellular 
  spaces, 
  36* 
  

   Iodine, 
  from 
  algse, 
  231 
  

   Iodine 
  test 
  for 
  starch, 
  40 
  

   Irish 
  moss, 
  233 
  

   Irrigation, 
  322, 
  323 
  

   Irritability, 
  22 
  

   Irritability 
  in 
  plants, 
  nature 
  and 
  

  

  occurrence 
  of, 
  22 
  

   Ivy, 
  relations 
  of, 
  to 
  light, 
  59* 
  

  

  Jordan, 
  E. 
  O., 
  201 
  

   Juniper, 
  294 
  

   Jute, 
  313 
  

  

  Kelps, 
  231 
  

  

  Knees 
  of 
  cypress, 
  26* 
  

  

  Knotgrass, 
  pollination 
  of, 
  142* 
  

  

  Knots, 
  67*, 
  68 
  

  

  Kolreuter, 
  138 
  

  

  Laminaria, 
  231 
  

  

  Lateral 
  buds, 
  95* 
  

  

  Layering, 
  90 
  

  

  Leaf, 
  34-36, 
  *69-84 
  

  

  Leaf, 
  fall 
  of, 
  77-79 
  

  

  Leaf 
  arrangement, 
  *7l-76 
  

  

  Leaf 
  buds, 
  95*, 
  101* 
  

  

  Leaf 
  mosaics, 
  74 
  

  

  Leaf 
  movements, 
  77* 
  

  

  Leaf 
  scars, 
  95*, 
  102*, 
  103*, 
  105* 
  

  

  Leaf 
  section, 
  36* 
  

  

  Leaves, 
  compound, 
  13 
  

  

  Leaves, 
  functions 
  of, 
  38 
  

  

  Leaves, 
  simple, 
  13 
  

  

  Leaves, 
  structure 
  of, 
  13, 
  *34~36 
  

  

  Leaves, 
  submerged, 
  79* 
  

  

  Leguminous 
  plants, 
  205*, 
  207* 
  

  

  Lenticels, 
  103, 
  105*, 
  106 
  

  

  Leucoplasts, 
  41 
  

  

  Lianas. 
  See 
  Climbing 
  plants 
  

  

  Lichens, 
  *247-251 
  

  

  Lichens, 
  nature 
  of, 
  249 
  

  

  Lichens 
  and 
  soil 
  formation, 
  250 
  

  

  Lichens, 
  uses 
  of, 
  250, 
  251 
  

  

  Light, 
  exposure 
  to, 
  58-60* 
  

  

  Light, 
  movements 
  caused 
  by, 
  76 
  

  

  Lilac 
  mildew, 
  244* 
  

  

  Litmus, 
  251 
  

  

  Live-forever, 
  126* 
  

  

  Liverworts, 
  262, 
  268, 
  269*, 
  281 
  

  

  Lizard's-tail, 
  127* 
  

  

  Locules, 
  129*, 
  131* 
  

  

  Long-leaf 
  pine, 
  294, 
  297* 
  

  

  Lycoperdon, 
  259*, 
  261 
  

  

  Lycopodinese, 
  281 
  

  

  Lycopodium, 
  279* 
  

  

  Macrocystis, 
  231 
  

  

  Maidenhair 
  fern, 
  270* 
  

  

  Male 
  cells 
  of 
  pollen 
  tube, 
  135*, 
  291* 
  

  

  Male 
  nuclei 
  of 
  pollen 
  tube, 
  135*, 
  291* 
  

  

  Mallows, 
  pollination 
  in, 
  140* 
  

  

  Maple 
  sugar, 
  309, 
  311 
  

  

  Marchantia, 
  269* 
  

  

  Marl, 
  229 
  

  

  Matrimony 
  vine, 
  pollination 
  in, 
  140* 
  

  

  May 
  apple, 
  86* 
  

  

  Mendel's 
  law, 
  187, 
  188 
  

  

  Mesophytes, 
  82 
  

  

  Mesquite, 
  root 
  system 
  of, 
  29 
  

  

  Microsphaera, 
  261 
  

  

  Micropyle, 
  136*, 
  300, 
  301* 
  

  

  Microspore, 
  290 
  

  

  Microsporophyll, 
  290 
  

  

  Migula, 
  W., 
  199 
  

  

  