594 



INDEX 



Homospory, 442. 



Homozygous, 545. 



Hooke, Robert, 113. 



Hormogonia, 299, 299*. 



Horny endosperm, 64, 63*, 64*. 



Horse Nettle, 492, 491*. 



Horsetails, 426; described, 435. 



Horticulture, 1. 



Host, 337. 



Huckleberries, 489. 



Hugo De Vries, 523, 523*. 



Hugo Von Mohl, 113. 



Humus, 154. 



Hybridization, 579. 



Hydrocyanic acid, 286. 



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*. 

 Indusium, 429, 430*. 

 Infection hypha, 394. 

 Inferior ovary, 15, 15*. 

 Inflorescence, 26; determinate, 28, 



32*; indeterminate, 28, 32.* 

 Inheritance, in. Corn, 548*, 550*, 



551*, 552*; in Cucurbits, 529*; 



in Wheat, 553*. 

 Inorganic evolution, 559. 

 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, 284. 

 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, 



158. 



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, 



65, 65*. 



Lactiferous vessels, 133. 

 Lady's Thumb, seeds, 75. 

 Lamarck's Evening Primrose, 529. 

 Lamarck, 563; his explanation of evo- 

 lution, 563. 

 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. 



