456 



VEGETABLE PHYSIOLOGY 



Micellae ot cell-wall, 43 



Micrococcus Urece, 255 



Microspores, 429 



Middle lamella, 45 



Mimosa, 62, 355, 357, 369, 371, 383, 

 388 



Mimulus, 383 



Mistletoe, 199, 343 



Mitosis, 413 



MIYOSHI on chemotaxis, 393 



Monoblepharis, 424 



Monoecious plants, 442 



Monotropa, 198 



Moorland plants, 338 



Movements, of protoplasm, 6, 348 ; 

 for capture, 191, 193; of multi- 

 cellular organs, 348 



Mucilage, 51, 234 



Mucor, 449 



Mycodermd aceti, 256 



Mycorhiza, 198 



Myriophyllum, 117 



Myronate of potash, see Sinigrin 



Myrosin, 248, 253 



Myxomycetes, 49, 346, 391, 392, 393 



NAEGELI, theory of composition of 

 cell-wall, 43 



Nectar, 272 



Nectary, 62, 440 



Negative pressure, in wood-vessels, 

 89, 91 ; influence of, on move- 

 ments of gases, 116 



Neottia, 185 



Nepenthes, 135, 190, 247 



Nervous mechanisms, 397 



Nickel, 175 



Nicotiana, 373 



Nitella, 6, 350 



Nitrates, 129, 160 



Nitrification, 134, 158 



Nitrogen, absorption of, 113, 133; 

 in proteins, 161 ; fixation of, by 

 leguminous plants, 134, 165, 197, 

 by Algse, 165 



Nostoc, 12, 195 



Nuclear spindle, 414 



Nuclein, 8, 175, 177 



Nucleolus, 8 



Nucleoplasm, 8 



Nucleus, 5 ; position in cell, 7 ; 

 structure of, 8 ; definitive, 433 ; 

 generative, 437 



Nutation, 315 



Nyctitropic movements, 325, 372, 

 374, 376 



Nymphaa, 108, 332 



(Edogonium, 427 



Oil, see Fat 



Oncidium, 239 



Oogonia, 424 



Oospheres, 423 



Oospore, 425 



Optically active compounds, 153 



Opuntia, 292, 296 



Ornithogahtm, 239 



Orobanchacece, 342 



Orobanche, 202 



Orthocarbonic acid in photosyn- 

 thesis, 154 



Osmosis, 55 ; in adult cells, 60 ; 

 from veins of leaf, 74; influence 

 of, on transpiration current, 100, 

 102 



Ouvirandra, 332 



Ovule, 431 



Oxalic acid, 296 



Oxalidacece, 371 



Oxalis acetosella, 362 



Oxidases, 255, 259, 299, 300 



Oxidation, 299 



Oxygen, mode of absorption by 

 plants, 15, 31, 115 ; influence of, 

 on action of roots, 85; proof of 

 absorption of, 287 ; relation of 

 absorption of, to exhalation of 

 carbon dioxide, 291 ; variation in 

 amount of, as affecting respiration, 

 297 



P<zonia, 40 



Pangium, 168 



Papain, 252 



Paraheliotropism, 362 



Parapectine, 42 



Parasites, 121, 340 



Parasitism, 185, 196, 200 



Paratonic influence of light, 359 



Parnassia, 441 



Parthenogenesis, 449 



Passiflwa, 385, 398 



Pectase, 248, 251, 252 



Pectic acid, 42 ; relation to middle 



lamella, 46 

 Pectine, 41 

 Pectose, 41 

 Pediastrum, 12 

 Pelvetia, 18 

 Pennisetum, 27, 29 

 Pepsin, 248, 251, 252 

 Peptone, 163 

 Perception, 406 



Periodicity of root-pressure, 87, 356 

 Perisperm, 434 



