GENERAL INDEX. 



297 



Nyctitropic curvatures, 364 

 movemeuts, 273 



Ocdogonium, 193 

 Oil-glands, 154 

 Oogouium, 189 

 Ooiiiycetes. 194 

 Oospore, 188 

 Open bundles, 83 

 Organic acids, 140 

 (Organs of plants, 155, 344 

 Origin of species, 244 

 Orthoslichy, 179 

 Orthotropic, 275 

 Orthotropous, 238 

 Osmosis, 106 

 Ovary, 212, 228 

 Ovule, 227 

 Oxygen, 358 



Palisade-cells, 133 

 Panicle, 182 

 Parasites, 143 

 Parastiehy, 178 

 Parenchyma, 41 

 Parietal placentation, 228 

 Parmelia, 146 

 Passive growth, 261 

 Peduncle, 163 

 Pyloric flowers, 219 

 Perennial plants, 158 

 Perianth, 215 

 Periblem, 49 

 Pericambium, 60 

 Pericarp, 232 

 Peridium, 196 

 Perigynous, 217 

 Perisperm, 230 

 Peristome, 202 

 Permanence, 344 

 Petiole, 160 

 Phelloderm, 57 

 Phellogen, 56 

 Phloem, 75 

 Phloim-bundle, 75 

 Phosphorus, 254 

 Phototonous, 273 

 Phylloclades. 160 

 Phyllodes, 160 

 Phyllome, 157, 159 

 Phyllotaxy, 171, 175 

 Phylogeuy, 245 

 Physiology, 1, 2, 353, 358 

 Pinn*, 161 

 Pinnulae, 161 

 Pitted vessels, 35 

 Placenta, 312 

 Plagiotropic, 275 

 Plane of symmetry, 219 

 Plant-diseases, 197 

 Plasm, 4 



Plasmic movement, 277 

 Plasmic utricle, 4-6 

 Plasmolysis, 7-9 



Pleon, 267 

 Plerome, 49 

 Pleurotropous, 339 

 Polioplasm, 6 

 Pollen-grain, 211, 223 

 Pollen-sac, 223 

 Pollen- tube. 204.313 

 Pollination, 238 

 Pollinium, 227 

 Polycarpous, 158 

 Polymerous, 228 

 Pore. 36 

 Pore-canal, 37 

 Pore- membrane. 38 

 Porous thickenings, 34, 36 

 Potassium 253 

 Primary cortex, 91 

 Primary membrane, 41 

 Primary vessels, 35 

 Primordia, 219 

 Primordial utricle, 5, 7 

 Promycelium, 198 

 Pro-nucleus, 241 

 Prosenchyma, 41 

 Prolan dry, 239 

 Proteids, 99 

 Protballium, 202 

 Protococcus, 193 

 Protogynous, 239 

 Proton ema, 194 

 Protoplasm, 4 

 Pseudaxis, 180 

 Pseudo-parenchyma, 199 

 Pucciuia. 197 

 Pyrenoids, 15 



Raceme, 182 



Racemose infloreseuce, 183 



Radial structure, 166 



Rank, 183 



Raphe, 339 



Receptacle, 216, 231 



Reciprocal hydrids, 241 



Rectipetality, 280 



Reproduction, 185 



Reserve materials, 150 



Reservohs for reserve materials, 143 



Resin, 152, 256 



Resin-ducts, 153 



Respiration, 356 



Rest period, 237 



Resupiuation, 220 



Retardation of growth by light, 373 



Reversion, 242 



Rheotropism, 276 



Rhexigeuous, 154 



Rhizotds, 140 



Rhizome, 157 



Root, 157 



Root-c<ti5, 47, 116 



Root- hairs, 139 



Root- pressure, 107 



Roots, 139 



Root-sheath, 113 



