INDEX 



Income, material, 207. 



Indusium, 156, 157, 163, 165, 172, 175, 177, 



Injury, 440 ; mechanical, 482. 



Insectivorous plants, 386. 



Integument, 183, 196, 205, 209, 210, 213, 



214, 230, 232, 233, 261, 280. 

 Internodes, 41, 145. 

 Inline, 147, 258. 

 Inulase, 400. 

 Inulin, 391. 

 Invertase, 400. 

 Involucre, 280. 



Irregularity, flowers, 256, 278, 280, 282. 

 Irritability, 426 ; loss of, 434. 

 Isocarpic flowers, 281. 

 Isoetes, embryo, 141; gametophytes, 140; 



habit, 138; sporangia, 139. 

 Isogamy, 16. 

 Isolation, 292. 



Jungcrmanniales, 101 ; contrast with Mar- 

 chantiales, 105. 



Laboulbeniales, 77. 



Lactic fermentation, 410. 



Lactuca, root hairs, 312. 



Lagenostoma, 182. 



Laminariaceae, 47. 



Laminaria, 46. 



Latex system, 306. 



Leaf, angiosperms, 250, 251; fall of, 354; 

 gaps, 159 ; gymnosperms, IQO, IQI, 192, 

 193, 203, 204, 207, 208, 220, 229; liver- 

 worts, 101, 104; mosses, in, 112, 116; 

 pteridophytes, 122, 133, 138, 150, 151, 

 158, 163, 164, 171, 176; traces, 125, 192, 



IQ4. 



Leafy liverworts, 101. 



Lecithins, 360. 



Leguminosae, 280 ; relation to nitrogen, 379. 



Lenticel, 240, 241. 



Leptosporangiates, 162. 



Lessonia, 48. 



Leucoplast, 389. 



Lichens, 78, 91. 



Life, 408. 



Light, exposure to, 370; and form, 437; 



and growth, 435; and nastic curvatures, 



443; photosynthesis, 368; position, 478; 



source of, 372. 

 Ligulatae, 132. 



Ligule, Lycopodiales, 132, 134, 137, 139, 141. 

 Liliales, 278. 

 Lily, anther section, 259; leaf epidermis, 



2 si; leaf section, 250, 319. 

 Liquids, 302. 

 Liverworts, 93. 

 Locomotion, 444. 



Lycoperdales, 90. 



Lycoperdon, oo. 



Lycopodiaceae, conclusions, 132. 



Lycopodiales, 122. 



Lycopodium, 122 ; antheridium, 129; arche- 

 gonium, 130; embryo, 131; gametophyte, 

 127, 128, 129; habit, 12 3, 134; sporan- 

 gium, 12 5, 126; stele, 725. 



Lyginodendron, stem section; 182. 



Lygodium, sporangium, 157. 



Lyngbya, 6. 



Macrocystis, habit, 47. 



Malic acid, 414. 



Maltase, 400. 



Manubrium, 43. 



Maple sap, 334. 



Marattia, embryo, 169; habit, 158; leaflet, 



164. 



Marattiaceae, 155 ; antheridium, 166 ; spo- 

 rangia, 1 60. 



Marchantia, 98, 99, 100, 435. 

 Marchantiaceae, 97. 

 Marchantiales, 93 ; contrast with Junger- 



manniales, 105. 

 Marsilea, female gametophyte, 179; habit, 



176; male gametophyte, 178; sporocarp, 



777. 



Marsileaceae, 176. 

 Massulae, water ferns, 173, 175. 

 Material income, 297. 

 Material outgo, 323. 

 Mechanical stimuli, 439. 

 Medulla, kelps, 48. 

 Medullosa, 182. 

 Megaceros, 106. 

 Megasporangium, 134, 135, 139, 172, 173, 



174, 177, 261, 262, 263. 

 Megaspore, 135, 172, 196, 262. 

 Megasporocarp, 777, 772. 

 Megasporophyll, 135, 197. 

 Members, 297. 

 Membrane, cell wall, 306; cytoplasmic, 



306 ; impermeable, 305 ; permeable, 305. 

 Mendel's law, 292. 

 Merismopedia, 6. 

 Meristem, 133 ; primary, 419 ; secondary, 



419. 



Mesarch, 157. 

 Mesembryanthemum, origin of lateral root, 



420. 



Mesocarpaceae, 38. 

 Mesophyll, 250. 



Metabolism, 402 ; destructive, 403. 

 Metaxylem, 157, 241. 

 Micellae, 300. 

 Microcycas, 201. 

 Microorganisms, 409. 



F 



