348 



THE STORY OF PLANT LIFE 



Heart's Ease, 89 



Heartwoodj 38 



Heat, 28, 30, 33, 42, 53 



Heath group, 176, 177, 226, 273, 

 274,314,315, 319 



Heaths, 179, 274, 315, 321 



Hedge Mustard, 93, 94 



Helianthemum, 120, 121 



„ guttattim, 1 19, 122 



„ vulgar e, 120 {123) 



Heliotropism, 120 



Hellebore, 68 



Helleboreae, 67 



Helleborus, 67, 68 



Hemlock, 259 



„ Group, 182, 258 



Hemp, 306 



Agrimony, 306, 307 



Henna, 240 



Herniaria, 129 



Herodotus, 114, 163 



Hibiscese, 155 



Hibiscus, 155 



HiJdebrand, 129 



Hills, 28 



Hippuris vulgaris, 232 (235) 



Histology, 2 



Hoary Brassica or Mustard, no 



Hogweed, 259, 261 



Hollies, 176 



Holly, 65, 175, 177, 179 



„ Group, 61, 175, 177, 183, 



184, 273 

 Hollyhock, 155 

 Homer, 272 



Honey-suckle, 277 (280) 

 Honey-suckle Group, 269, 273 

 Hook-climbers, 71 

 Hooker, 183 

 Horsemint, 309 

 Horseshoe Vetch, 286 



Horsetails, arborescent, 28 



232, 233 

 Hottoniese, 328 

 Hottonia palustris, 3^2 (335) 

 Hound's Tongue Group, 274 

 House-leek, 218 

 Humous acids, 18, 19, 34 

 Hutchinsia, 95 

 Hydathodes, 22, 40 

 Hydrangea, 212 



Hydrocotyle vulgaris, 26 1 (263) 

 Hydrogen, 39, 47, 49, 55, 56 

 Hygrophiles, 26 

 Hygrophytes, 22 

 Hygroscopic water, 20 

 Hypecoideae, 81 

 Hypccoum, 81 

 Hypericacese, 64, 150, 152 

 Hypericu7n, 150 



Hypericum hirsutum, 152 (154) 

 Hypocotyl, 32 

 Hyssop-leaved Loosestrife, 239 



Ice, 18 



Hex paraguayensis, 177 



Ilicacese, 64 



Ilicinese, 175, 183 



Illecebracese, 64, 129, 136 



niecehrum, 129 



hnpatiens parviflora, 173 (175) 



Incompletse, 61 



Insectivorous plants, 226, 230 



Intercellular spaces, 15, 20, 39, 40, 



41,42, 46 

 Intramolecular respiration, 42 

 Inulin, 56 

 Iodides, 51 

 Iron, 47, 49, 51 



,, chloride, 48 

 Isatis, 94 

 Isle of Man Cabbage, no 



