INDEX 



455 



Hori-E SEYLER on chlorophyll, 144, 

 177 



Humus, 67 



Hybridisation, 446 



Hydrocyanic acid, 168, 254 



Hydrogen peroxide in photosynthe- 

 sis, 154, 156 



Hydrophilous flowers, 439 



Hydrotropism, 391 



Hypnum, 185 



Hyponasty, 314 



Individual, 411 



Insectivorous plants, 135 ; Utricu- 

 laria, 187 ; Sarraccnia, 189 ; 

 Nepenthes, 190 ; Drosophyllum, 

 191 ; Pinguicula, 191 ; Dioncea, 

 192, 193 ; Drosera, 192 



Intercellular passages, 31, 32; for- 

 mation of, 32, 104 ; function of, 

 34, 104 ; watery vapour in, 74 ; 

 in Isoetes, 106, 332 ; in Marsilea, 

 107, 334 ; relation to stomata, 

 111 ; ratio fo cellular tissue in 

 leaves, 113 ; composition of air 

 in, 113, 114 ; positive gaseous 

 pressure in, 117 ; in aquatic 

 plants, 331 



Intercellular substance, 45 



Inulase, 248, 250 



Inulin, 232 



Invertase, 248, 250, 444 



Iodine, 129, 175, 181 



Iron, in ash of plants, 129, 175 ; 

 combinations absorbed, 136, 179 ; 

 relation to chlorophyll, 149 ; 

 function of, 178 



Irritability, 358, 393 



Isoetes, 106, 107, 332, 430 



JUMELLE on decomposition of car- 

 bon dioxide, 150 

 Juncus, 28, 29 



Kachree gourd, 252 



Karyokinesis, 413 



Katabolism, 123, 258 



Kephir, 196 



Klinostat, 380 



KNIGHT on action of centrifugal 



force on the direction of growth, 



382 



Laccase, 181, 299 

 Lactase, 250 



Latent period of response to stimu- 

 lation, 407 

 Lathrcca, 202 

 Laticiferous systems, 220 

 Leaves, sclerenchyma of, 27 ; rolled, 



112 ; irritability of, 372 

 Lecithin, 177, 254 



Leguminosce, cotyledons of, 40 ; 

 absorption of nitrogen by, 134, 

 165, 196 ; irritability of leaves of, 

 371 



Lenticels, 34, 76 

 Leucin, 167 

 Leucoplasts, 148, 229 

 Lichens, 196 



Light, influence of, on transpiration, 

 95 ; absorption of, by chlorophyll, 

 143, 279 ; necessary for formation 

 of chlorophyll, 148 ; action in 

 photosynthesis, 149, 156 ; tonic 

 influence of, 359 ; effect of, on 

 differentiation of leaves, 360 ; 

 effect on growth, 364 ; lateral, 

 377 



Lignin, 47, 50, 271 

 Lipase, 248, 254 

 Lithium, 175 



Locomotion, 276, 347, 348 

 Lycopodium, 40, 185 

 Lythrum, 443 



MACALLUM on composition of 

 nucleus, 178 



Magnesium, in ash, 129, 136, 175; 

 mode of absorption of, 178 



Malic acid, attraction for anthero- 

 zoids, 392 



Maltase, 248 



Malto-dextrin, 249 



Manganese, 129, 175, 181 



Marchantia, photo-epinasty of, 363, 

 379 



Marsilea, 51, 107 



Massula of Azolla, 441 



Medullary rays, influence of, on 

 transpiration current, 81 ; as store- 

 houses of reserve material, 225 



Megaspores, 429 



Melampyrum, 203 



Melibiase, 250 



Melizitase, 250 



Mesocarpece, 422 



Mesocarpus, 357, 363, 403 



Metabolism, 6, 123, 258 



Metapectic acid, 42 



Metapectine, 42 



Meta-proteins, 163 



Methane, 168 



