INDEX 



343 



Pungent apex 30, 191, 192, 296, 



305, 315 



Purple Osier 248 

 Purple surface 37 

 Purple violet twigs 277 

 Purple Willow 178, 179 

 Pyrus 13, 89 

 P. Aria 21, 37, 44, 45, 175, 210, 



252 



P. Aucuparia 173, 174 

 P. communis 274, 275 

 P. Mains 250, 251 

 P. Sorbus 45, 174 

 P. torminalis 15, 21, 45, 141, 205- 



207, 223 



Quadrangular leaf 316 

 Quadrangular shoot 192 

 Quantity of carbon- dioxide 128, 



136 



Quaternaries 259 

 Quercus Cerris 25, 52, 211, 212 

 Q. coccinea 51, 215 

 Q. Ilex 249, 282 

 Q. pedunculata 214 

 Q. pubescens 210, 215 

 Q. Eobur 53, 210, 213, 214 

 Q. rubra 215 

 Q. sessiliflora 214 

 Q. Suber 250 

 Quince 19 

 Quinque-foliolate leaf 43, 44 



Eachis 16, 38, 40, 41, 43, 151, 



171 



Radial structure 146, 117 

 Radiation 142 

 Radical leaves 4 

 Radish 6 

 Rain-drops 104 

 Ranks of leaves 5 

 Ranunculaceae 19 

 Ranunculus aquatilis 139 

 R. Ficaria 99 

 Raphides 227 



Rapidity of transpiration 122 

 Raspberry 17, 25, 26, 30, 45, 55, 



167, 168 



Ratios of gases evolved 127 

 Ravenala 34 

 Rays absorbed 135 

 Rays of light 128, 133 



Red Currant 21, 26, 45, 64, 37, 



221, 222 



Red light 92, 112, 133 

 Red Oak 215 

 Red surfaces 37 

 Red Whortleberry 301 

 Red-orange rays 125, 133, 134, 135 

 Reduction of transpiring surfaces 



146 



Refrangible rays 110, 112 

 Regular tertiaries 62 

 Regulating action of epidermis 97, 



105 



Regulation by stomata 122 

 Reniform leaf 23 

 Reserve-materials 120, 130 

 Resinous plants 121, 193, 305, 



308, 313, 316 

 Respiration 90, 91, 96, 122, 126- 



128, 130, 131, 142 

 Respiratory cavity 100 

 Retardation of growth 110 

 Reticulate venation 32-35, 48, 54, 



59, 60, 151, 232, 250, 251, 255, 



265, 282, 288, 289, 291 

 Reticulate Willow 290 

 Reticulation 49, 50, 53, 54, 56, 58, 



290 



Retuse apex 27, 28, 29 

 Revolute margin 191, 193, 195, 



299, 301, 302 



Rhamnus 8, 13, 89, 278, 282 

 R. catharticus 21, 58, 189, 190 

 R. Frangula 21, 34, 291, 292 

 Rhinanthaceae 35 

 Rhododendron 13, 15, 20, 24, 56 

 R. ponticum 300 

 Rhomboid-cordate leaf 260 

 Rhubarb 20 

 Rhus 45 



Rhijtisma 183, 186 

 Ribes 13, 89 

 R. Grossularia 219, 222 

 R. nigrum 220, 221 

 R. rubrum 221, 222 

 Ribs 14, 32, 40, 46, 48, 79, 88, 159 

 Ridge of guard-cell 101 

 Rigid leaf 191, 307 

 Rigid shoot 300 

 Robinia 13, 15, 17, 21, 25, 28, 29, 



44, 45, 54, 58, 59, 89, 112, 113, 



116, 118, 166 



