576 



INDEX 



Host, 337. 

 Huckleberries, 489. 

 Hugo De Vries, 524, 524*. 

 Hugo Von Mohl, 113. 

 Humus, 154. 

 Hybridization, 561. 

 Hydrocyanic acid, 282. 

 Hydrodictyon, 309. 

 Hydrodictyon reticulatum, 309*. 

 Hydrophytes, 504. 

 Hydnum, 388, 387*. 

 Hydrophytic societies, 504. 

 Hydrotropism, 151, 151*. 

 Hygroscopic water, 153. 

 Hymenium, 365. 

 Hymenomycetes, 384. 

 Hypha, 352; infection, 394. 

 Hypocotyl, of Bean, 56, 56*, 106*; 



of Bean type of seedlings, 107; 



of Corn, 63; of Onion, 105*; of 



Red Clover, 109*; of Squash, 107, 



107*. 

 Hypogynous flowers, 16, 15*, 484*. 



Impatiens, 88. 



Imperfect Fungi, 352; described, 404. 

 Inbreeding, results, 564, 563*, 564*. 

 Incomplete flowers, 13, 11*, 12*. 

 Indeterminate inflorescence, 28, 28*. 

 Indian Turnip, 18, 18*. 

 Induaium, 429, 430*. 

 Infection hypha, 394. 

 Inferior ovary, 15, 15*. 

 Inflorescence, 26; determinate, 28, 



32*; indeterminate, 28, 32*. 

 Inheritance, 517; described, 519; in 



ears of Corn, 551*; in heads of 



Wheat, 552*. 

 Inorganic evolution, 513. 

 Integument, 38, 35*, 36*, 38*, 39*; of 



Cycads, 448, 449*; of Pines, 454, 



455*. 

 Interdependence of shoot and root, 



136. 

 Internodes, 166; of Corn seedling, 



183*. 



Interrupted Fern, 431, 431*. 

 Invertase, 285. 



Investigations since Mendel, 547. 



Involucre, 30, 29*. 



Iodine test for starch, 256. 



Irish Moss, 326, 325*. 



Irish Potato, roots, 142; eyes and scale 



leaves, 181, 179*; propagation, 



226, 226*. 

 Iron, a mineral element for crops, 



157. 



Isoetes, 438. 

 Isogametes, 302. 



Jerusalem Artichoke, 181. 

 Jimson Weed, 61. 

 Johnson Grass, 177. 

 Juglandaceae, 474. 

 Jungermaniales, 407. 



Kafir Corn, 142. 



Keel, 24, 23*. 



Kelps, 319, 319*, 320*. 



Kernel of Corn, 44*; structure, 62, 63, 



64*. 

 Kernel, of Oats, 22, 45*; of Wheat v 65, 



65*. 



Lactiferous vessels, 133. 



Lady's Thumb, seeds, 75. 



Lamarck's Evening Primrose, 529. 



Lamarck, 515; his explanation of evo- 

 lution, 515. 



Laminarias, 319. 



Lamb's Quarter, seeds, 75*, 76*. 



Larches, 451. 



Large seeded Alfalfa Dodder, 76*. 



Lateral buds, 206, 206*. 



Lateral flowers, 27. 



Law of Dominance, 543. 



Layering, 225, 231*. 



Leader, 312. 



Leaf Blight of Cotton, 404. 



Leaf buds, 207. 



Leaflet, 237, 237*, 238*. 



Leaf traces, 185, 186*. 



Leaves, 233-286; auricles, 235, 236*; 

 base, 235; blade, 235; cellular 

 structure, 246-252; compound, 

 237, 237*; development, 234; 



