538 



PRACTICAL BOTANY 



Great Basin, 508 

 Green algae, * 188-207 

 Green felt. See Vaucheria 

 Green slime, 188 

 Groups of plants, 156, 158 

 Growing point, 52* 

 Guard cells, 13*, 14 - 

 Gymnosperm, life history of, 299-311 

 Gymnosperm cones, 310*, 311* 

 Gymnosperms, 158, *299-320 

 Gymnosperms, classification of, 320 

 Gymnosperms of past ages, 318, 319 

 Gymnosporangium, 246*, 247* 

 Gynecoeum, 111 



Gypsy moth, destruction caused by, 

 411 



Hairs, root, 7, 8*, 9 



Hairs on leaves, 70*, 71, 485, 486 



Half -inferior ovary, 113 



Halophytes, 497*, 499 



Hard bast, 47* 



Hard woods, *391-393 



Hardwoqd trees, 350, 351 



Haustoria, 36, 221*, 230, 384 



Hay, 458 



Hays, W. M., 417 



Head, 516*, 517* 



Heartwood, 51 



Heath family, 363*, 364 



Helophytes, 479 



Helotism, 373 



Helotists, 213 



Hemlock, 310*, 312, 313 



Hepaticae, 257, 273 



Herbs, 35, 90 



Heredity. See Coming true 



Heterocyst, 183 



Heterospory, 295 



Hevea, 357* 



Hickory, buds of, 92* 



Hilum, 136* 



Holdfast, 196*, 202*, 206, 208*, 210* 



Holly wood, section of, 392* 



Honeybee, leg of, 123* 



Hop, twining of, 60* 



Hopkins, C. G., 420 



Horse nettle, 471* 



Horse-chestnut buds, 100*, 101* 



Horsetails, *291-293 



Horticulture, 434, 451-455 



Host, 35, 36 



Humus, 382, 435, 436 



Hyacinth, bulb of, 74* 



Hybrid blackberries, 430 



Hybrid plums, 430* 



Hybridizing, *426-431 



Hybrids, 426, 428*, 429*, 430, 431 



Hydnum, 252 



Hydrangea, 11 



Hydrogen, 16 



Hydrophytes, 479. See also Water 



plants 



Hypha, 214* 



Hypocotyl, 136*, 137*, 143* 

 Hypogynous, 114 



Iceland moss, 239 

 Immigration of plants, 500-503 

 Immune, 172, 432 

 Imperfect fungi, 234 

 Indefinite annual growth, 95 

 Independent plants, 371 

 Indeterminate inflorescence, 519 

 Indian corn, kernel of, 419*, 420 

 Indian corn, light requirement of. 



494 

 Indian corn, structure of stem of. 



11*, 54* 



Indian corn breeding, *4l 7-424 

 Indian corn culture, 456, 457 

 Indian pipe, 381* 

 Indusium, 279*, 280*, 286* 

 Industries, plants in, 2, 3. See also 



under Agriculture, Horticulture, 



Fuel, Fibers, Timber 

 Inferior ovary, 113* 

 Inflorescence, *515-519 

 Inflorescence, determinate, 519 

 Inflorescence, diagrams of, 518* 

 Inflorescence, indeterminate, 519 

 Insect pollination, *123-129 

 Insectivorous plants. See Carnivo- 

 rous plants 

 Insects, pollen-carrying apparatus 



of, 123*, 129* 



Insects, sense of smell of, 124, 125 

 Insects, vision of, 125, 126 

 Integuments, 324* 

 Intercellular spaces, 14*, 479* 

 Internode, 100*, 101* 

 Invasion, 501, 502 

 Involucre, 519 

 Iodine test for starch, 78, 79 

 Irish moss, 212 

 Iron, 15, 448 

 Ironweed, fruits of, 152* 

 Irrigation, 440, 441 

 Irritability in plants, nature and 



occurrence of, 388, 389 



