342 



INDEX 



Pipes 78, 80, 83, 143 



Pistia 71 



Pith 67, 68, 70 



Plane 13, 14, 28, 30, 34, 37, 45, 



62, 63, 89, 106, 186, 230, 231 

 Plantago 35 

 Plantain 4, 6 

 Plantlet 130 

 Plant-substance 95 

 Plastic organ 138, 139 

 Plastidia 74-75 

 Plastids 67, 74-77 

 Platanus 19, 107 

 P. occidentalis 231 

 P. orientalis 63, 230, 231 

 Plicate vernation 238 

 Plum 29, 30, 59, 118, 257, 268 

 Pointed apex 27 

 Poisons 93 

 Polar regions 147 

 Polished surface 36, 161, 186, 232, 



276, 299 

 Pollard 246 

 Pollen-grains 71 

 Polygonacea; 20 

 Pohjgonatum 35 

 Polygonum 20 

 Pontederia 71 

 Poplar 13, 18, 21, 34, 59, 81, 



89, 118, 119 

 Populus alba 62, 208, 223, 253, 



254 

 P. canadensis 262, 264 

 P. canescens 210, 254 

 P. nigra 262, 263 

 P. pyramidalis 263 

 P. tremula 255, 264, 290 

 Pore 102, 103, 105 

 Portugal Laurel 24, 30, 56, 232 

 Position of leaves 3, 9, 99, 108- 



118, 134 

 Potamogeton 35 

 P. densns 7 

 P. nutans 99 

 Potato 67, 68, 71 

 Powerfully transpiring trees 141 

 Prairie plants 148 

 Pressure of water 106 

 Prickles 97, 159, 161, 167, 170, 



172, 173 

 Prickly teeth 37 

 Primary functions 142 



Primary ribs 46, 48, 50, 51, 64 



Primordial cell 77 



Primrose 4 



Primula sinensis 106 



Principal function of leaf 108, 



117, 125, 135 

 Prismatic cells 101 

 Privet 13, 20, 24, 28, 29, 59, 118, 



201, 202 

 Projection of phyllotaxy 6 

 Prominent venation 35, 54, 280 

 Propagation of stimulus 116 

 Properties of epidermis 97 

 Proportions of water transpired 



141 

 Prostrate plants 11, 119, 195, 



279, 288 

 Protea 148 



Protected stomata 100 

 Protection by cuticle 146 

 Protection by stipules 19 

 Protective functions of epidermis 



97 

 Protoplasm 67, 74-78, 86, 90, 93, 



97, 114 

 Prunus 13, 89, 107, 121, 249, 



272, 274, 276 

 P. Avium 21, 268, 269, 272, 274 

 P. Gerasus 270, 272, 273 

 P. domestica 267, 268, 274 

 P. insititia 267, 268, 274 

 P. Laurocerasus 232, 272 

 P. Lusitanica 232 

 P. Mahaleb 34 

 P. Padus 21, 106, 270, 271, 272, 



274 

 P. spinosa 52, 266, 267, 274 

 Pseudo-distichous phyllotaxy 12, 



313, 316 

 Pseudo-palmate base 61, 62, 63, 



207, 211, 234, 235, 253 

 Pseudo-palmate venation 62, 63, 



205, 218, 223, 230, 254, 255, 



262, 263, 265 

 Pseudo-parallel venation 35 

 Pseudotsuga Douglasii 316, 318 

 Pteris 102 



Pubescent surface 36 

 Puff-ball 71 

 Pulvinule 43 

 Pulvinus 38, 42, 43, 110, 113-116, 



148, 219, 223, 224 



