43 2 



Introduction to Botany. 



Honey locust, 135. 



Honeysuckle, 147. 



Hop hornbeam, 207. 



Hornbeam, 207. 



Horse-chestnut, 67, 68, 82 ; study of, 45. 



Horsetails, 286, 300, 353 ; prothallia of, 301 ; 



reproduction of, 300. 

 Hyacinth, 147, 206, 223. 

 Hydrophytes, 319 ; character of, 323 ; origin of, 



326 ; most general characteristics of, 326. 

 Hydrophytic conditions, 320. 

 Hydrotropism, diagram illustrating, 102. 

 Hypocotyl, 7. 

 Hypogynous, 204, 205. 

 Hypoxis erecta, 223. 



Imbedding in paraffin, 386. 



Indeterminate inflorescence, 159. 



Indian corn, 168 ; constitution of stem of, 52 ; 



cross section of stem of, 52 ; inflorescence 



of, 177 ; stem of, 59. 

 Insects, adaptations to, 179 ; sense of sight 



of, 182 ; sense of smell of, 182. 

 Internal energy, source of, 181. 

 Internodes, 66. 

 Iodine solution, 387. 

 Ipomcea, 812 ; leptophylla, 138. 

 Iridaceae, 228. 

 Iris, 175 ; germanica, 224 ; xiphium, 225. 



Jimson-weed, cross pollination of, 187. 



Keel, 237. 

 Koalreuter, 171. 



Lahore, maximum temperature at, 312. 



Larkspur, 147, 154, 207. 



Layering, method of, 44. 



Leaf bud, 69. 



Leaf, cross section of, 88 ; diagram of essen- 

 tial parts of, 89 ; summary of functions of, 

 99 ; work done by, 85, and pages following. 



Leaves, amount of work done by, 96 ; char- 

 acterization of, 98 ; continued growth of, 

 112 ; disposition of, in buds, 68 ; duration 

 of, 96 ; formation of, 66 ; guides for draw- 

 ing, 150 ; lifting power in, 61 ; light rela- 

 tion of, 82 ; modified, 142 ; position of, 81 ; 

 prominence of, 81 ; relation of, to roots, 99 ; 

 significance of definite arrangement of, 82 ; 

 size and form of, 97. 



Lemna, 40. 



Lenses, how to use, 372 ; care of, 873. 



Lenticels, 93. 



Lepidodendrons, 353, 354. 



Leucoplasts, 105, 106. 



Lichens, 264 ; nature of, 284. 



Life, length of, 183. 



Light, 308 ; as guide to growth, 63 ; effect of 

 dim, 308; effect of intense, 309 ; influence 

 of, 114 ; in temperate regions, 342 ; nature 

 of, 84. 



Ligulate corolla, 155. 



Lilac, 82. 



Liliaceaj, 228. 



Lima bean, 168 ; study of, 5. 



Lime water, 387 ; use of, IS. 



Linaria cymballaria, 65. 



Living substance, continuity of, 107. 



Lycopodium, 202, 204. 



Lycopods, 353. 



Macrosporangium, 203. 



Macrospore, 203. 



Macrosporophyll, 203. 



Maple, 207, 208 ; Cretaceous, 355. 



Materials, conduction of, 57. 



Medullary rays, 49 ; diagram of, 58, 60 ; func- 

 tion of, 51 ; movement in, 60. 



Melilotus alba, cross sections of leaf of, 90, 91. 



Mentzelia, 216. 



Mesembryanthemum, 142, 322. 



Micropyle, 7, 165, 167. 



Microscope, compound, 373, 374; diagram of 

 compound, 374 ; how to use, 872, 373, 374, 

 375 ; simple, 371. 



Microsporangium, 203. 



Microspore, 203. 



Microsporophyll, 203. 



Microtome, method of using simple, 878. 



Migration, 17; by seeds, 209. 



Mildews, 264. 



Milkweed, 207, 208. 



Mimosa pudica, 124, 126 ; preparing seedlings 

 of, 100. 



Mistletoe, 41. 



Modified leaves, 142. 



Modified roots, 188. 



Modified stems, 139. 



Monocotyledons, regions of continued growth 

 in, 110 ; time of appearance of, 355. 



Monoecious, 175. 



Morning glory, 184. 



Morphological elements, 134, 136 ; character- 

 istics of, 138. 



Moss, diagram of sporophyte and gameto- 

 phyte of, 296. 



Mosses, dissemination of spores of, 291 ; 

 gametophyte of, 296 ; illustration of, 289 ; 

 reproduction of, 290 ; sexual and asexual 

 generations of. 291 ; sporophyte of, 291. 



Motor organs, 122. 



Mountain heights, physical conditions of, 

 847 ; vegetation of, 347. 



