456 



VEGETABLE PHYSIOLOGY 



Methane, 182 



Micellae of cell-wall, 43 



Mici'ococcus Urea, 269 



Microspores, 429 



Middle lamella, 45 



Mimosa, 62, 356, 358, 370, 372, 384, 

 389 



Mimulus, 384 



Mistletoe, 213, 343 



Mitosis, 413 



MIYOSHI on chemotaxis, 394 



Monoblepliaris, 424 



Monoecious flowers, 441 



Mwiotropa, 213 



Moorland plants, 338 



Movements, of protoplasm, 6, 351 ; 

 for capture, 206, 208; of multi- 

 cellular organs, 349 



Mucilage, 51, 248 



Mucor, 448 



Mycoderma aceti, 270 



Mycorhiza, 213 



Myriophyllum, 117 



Myronate of potash, see Sinigrin 



Myrosin, 262, 267 



Myxomycetes, 49, 347, 392, 393, 394 



NAEGELI, theory of composition of 

 cell-wall, 43 



Nectar, 285 



Nectary, 62, 439 



Negative pressure, in wood-vessels, 

 89, 91 ; influence of, on move- 

 ments of gases, 116 



Neottia, 198 



Nepenthes, 149, 203, 261 



Nervous mechanisms, 397 



Nickel, 188 



Nicotiana, 373 



Nitella, 6, 351 



Nitrates, 143, 193 



Nitrification, 148, 171, 172 



Nitrogen, absorption of, 113, 147; 

 in proteids, 143; fixation of, by 

 leguminous plants 148, 178, 211, 

 by Algae 179 



Nostoc, 12 



Nuclear spindle, 414 



Nuclein, 8, 188, 190 



Nucleolus, 8 



Nucleoplasm, 8 



Nucleus, 5 ; position in cell, 7 ; 

 structure of, 8 ; definitive, 432 ; 

 generative, 436 



Nutation, 316 



Nyctitropic movements, 326, 373, 

 375, 377 



Nymphcea, 108, 333 



Oil, see Fat 



Oncidium, 253 



Oogonia, 424 



Oospheres, 423 



Oospore, 425 



Opuntia, 124, 128 



Orchidacece, 210 



Ornithogahim, 253 



Orobanchacecs, 343 



Orobanche, 217 



Orthocarbonic acid in photosyn- 

 thesis, 168 



Osmosis, 55 ; in adult cells, 60 ; 

 from veins of leaf, 74 ; influence 

 of, on transpiration- current, 100, 

 102 



Ouvirandra, 332 



Ovule, 431 



Oxalic acid, 129, 179 



Oxalidacece, 372 



Oxalis acetosella, 363 



Oxidases, 269, 300 



Oxidation, 299 



Oxygen, mode of absorption by 

 plants, 15, 31, 115 ; influence of, 

 on action of roots, 85 ; proof of 

 absorption of, 119 ; relation of 

 absorption of, to exhalation of 

 carbon dioxide, 125 ; variation in 

 amount of, as affecting respiration, 

 130 



j Pceonia, 40 



I Pangium, 181 



1 Papain, 266 



| Paraheliotropism, 363 



Parapectine, 42 



Parasites, 135, 341 



Parasitism, 198, 210, 214 



Paratonic influence of light, 360 



Parnassia, 440 



Parthenogenesis, 448 



Passiflora, 386, 398 

 | Pectase, 262, 265 



i Pectic acid, 42 ; relation to middle 

 lamella, 46 



Pectine, 41 



Pectose, 41 



Pediastrum, 12 



Pelvetia, 18 



Pennisetum, 27, 29 



Pepsin, 262, 265, 266 

 j Peptone, 176 

 1 Perception, 405 

 i Periodicity of root-pressure, 87, 357 



Perisperm, 434 



i PFEFFEB, on water-culture, 185 ; on 

 localisation of sensitiveness, 382, 

 400 



