INDEX. 



465 



Growth, conditions of, 115 



relation of chemical changes to, 



4 

 Growing point, 51, 82, 243, 284, 314 

 Guard cells, 9, 10 

 Gymnospermae, 321 

 Gymnosporangium, 225 



Hairs, plant, 10, 34, 35 



root, 42, 43, 44 

 Harper, 219 

 Haustoria, 212 

 Hazen, 157 

 Heath order, 437 

 Heartwood, 81 

 Helleborus, 408 

 Helvellales, 220 

 Hepaticae, 244 

 Hepatics, leafy, 261 



thallose, 244, 245 

 Heterocyst, 147 

 Heterogamous, 160 

 Heterospory, 316, 320 

 Heterostyly, 430 

 Hilum, 116 

 Honey locust, 419 

 Honeysuckle, 354 

 Hop, twining, 91 

 Hormogonium, 146, 147 

 Horsetail fern, 303 

 Hybrid, 125 

 Hydnaceae, 232, 233 

 Hydnum, 232 

 Hydrodictyon, 164 

 Hydrophytes, 35 

 Hymenium, 220, 231 

 Hypha, 196 



Hypocotyl, 112, 364, 396 

 Hypocreales, 216, 217 

 Hypogynous, 353 

 Hypoxylon, 215 

 Hysteriographium, 216 



Indian-pipe, 439 

 Indusium, 294, 295, 324 

 Inflorescence, 349 

 Insectivorous plants, 269, 447x2-/ 

 31 ' 



Insects, crossing by, 106, 349, 355, 

 379, 380, 383, 391, 443 

 sight and sense of smell, 384 

 Integument, 103, 323, 364 

 Intercellular spaces, 9, 20 

 Involucre, 258, 264, 433 

 Iris, 386 

 Ironweed, 458 

 Irritability, 29, 54, 88, 91 

 Isogamous, 159 



Jacket-cells, 325, 339 

 Jack-in-the-puipit, 378 

 Jeffery, 287 

 Juglandales, 402 

 Juglans, 402 

 J uncus, 385 

 Jungermaniales, 261 

 Juniperus, 344 



Keel, 419, 420 



Kelps, 185 



Kerner, 60 



Klebs, 165 



Knees of cypress, 41 



Knot, 85 



Labellum, 388, 390, 391 



Labiatae, 443 



Laminaria, 184 



Larkspur, 409 



Lateral roots, 52 



Lathyrus, 420, 421 



Leaf, arrangement of, 24-28 



compound, 28 



fall of, 37, 38 



movement, 28-32 



reduction of, 39 



structure of, 7-12, 32-37 



work of, 11-24 

 Leaf-scar, 98 

 Legume, 365 

 Lenticel, 73, 74 

 Leotia, 220 

 Lepidium, 356, 362 

 Lessonia, 184 

 Leucoplasts, 2, 18 



