6o8 



INDEX 



Idaho, 85 



Ilex (Holly, Mate, Paraguay-tea), 260 



/. aqiiifoliiim (Holly), 340, 342 

 Illinois, 569, 570 

 Illuminant, 266 

 Impatiens (Balsam), 124 



/. balsamina (Balsam), 122, 123 

 Imperata (Lalang Grass), 466 

 Importance of plants, vital, 255-82 

 Importation, restricted, disease control 

 Inclusion, 212 [by, 576 



India, 196, 233, 263, 272, 444 

 ■ — , desert in, 449 



— , forests etc. of, 423, 439, 442, 443 

 ■ — , fossil flora of, 148, 149 

 — , origin of crop plants in, 253 

 — , South, poor flora of, 172 

 — , tropical hardwoods in, 247 

 Indian Lotus, see Nelumbo nucifera 



— Ocean, 447 

 Indiana, 308 



Indicator plant communities, 552-5, 577 



— plants, 544, 552, 553-4, 573- 577, 



, geology and, 577 [578 



Indigo, 274 



Indo-China, 423, 439 



Malayan region, 253, 456 



Indonesia, 423, 439 



Industrial applications, 3, 46, 239, 261, 



265, 268-70, 274, 278 

 Infralittoral slope, 492, 493 



— zone, 493, 495-6, 511 512, 513, 527 

 Ingold, C. T., 127 



Inhibitors, growth, 13 



Inland saline areas, 367, 369-70, 502 



waters, 369-7°, 492, 502, 534 



Inorganic nutrients, 12, 301, 432, 519 

 Insect vectors, 1 17, 252, 305 

 Insecticides, 275, 276 

 Insectivorous plants, see Carnivorous 



plants 

 Insects, 16, 91, 1 17-18, 250, 424 

 Insolation, 284, 288, 294, 321, 375, 376 

 Insular climate, see Oceanic climate 

 Interaction of factors, 77, 283, 293-4, 



554 

 Intercontinental range (distribution), 



183-7 

 Interglacial periods, 129, 156, 157, 161 



— relic, 201 



— time, 129 



Internal aeration of plants, 86, 87, 505-6 

 Interpretation of landscapes and ecolo- 

 gical data, 551-5 

 Interrelationships of organisms, 9 

 Interruption of range of distribution, 



183, 188-97 

 Intertidal belt, zonation in, 526-7, 532 



— vegetation, 526, 529, 531-6, 537-8 

 Intervening tracts (of polygons), 395, 



396 



Intestinal worms, remedy for, 263 

 Intracontinental discontinuous range 



(distribution), 196, 197 

 Intraneous occurrence, 210 

 Introduction of exotics, 215, 243, 574, 



576 

 Introgression, 176, 177 

 Invasion, 324 

 Invertebrate animals (Invertebrates), 



117, 14s, 146, 495 

 Iodine, algal source of, 265 

 Ipecac, 264 

 Ipomoea batatas (Sweet Potato), 231 



258 

 /. pes-caprae, 458 

 Ira, see Dipterocarpus tuberculatus 

 Iraq, 254, 355, 365, 367, 368, 370, 451 



459, 485 

 — , desert of, 366, 367, 451-2, 453 

 Ireland, 197, 251 

 Iris sisyrinchium, 366 

 Irish-moss, see Chondrus crispus 



— Potato, see Solatium tuberosum 

 Iron wood, see Casuarina equisetifolia 

 Irrigation, 307, 309, 311, 370, 557 

 Island floras, 167, 169, 172, 205, 206 



222 



, endemism in, 172, 205 



Isoetes (Quillwort), 56, 57, 58 

 Isoflor, 208 

 Isolation, 176, 205-6 

 Ithyphalhis (Stinkhorn), 44, 45 

 Ivy, see Hedera and H. helix 



Jack-fruit, 258 



— Pine, see Piniis banksiana 

 Jackdaw, 114 

 Jactitation, 103, 105 

 Jamaica, flora of, 169, 172 

 Jamaican Lace-bark, 271 

 James, W. O., xviii, 95 



Jan Mayen Island, 382 537 



Japan, 21 1 



— , forests of, 338, 341, 351 



— , fossil flora of, 149 



— , marine Algae as food in, 259 



Java, 221 



Jericho, ancient cultivation in, 254 



Jerusalem Artichoke, 258 



Johnson, M. W., 312, 540 



grass, 259 



Johnston, M., 20 



Jojoba wax, 266 



Jones, S. G., 250, 253 



Jordan's Law of Geminate Species, 202 



jfovellana, 194 



Juglaus (Walnut), 258, 341 



y. nigra (Black Walnut), 80 

 Juglone, 80 

 Jujube, 258 

 Juncaceae, 500 



