INDEX. 



511 



PAGE 



Prothallus 19 



Prune 276 



Pruning 87. 88, 169, 257 



— and longevity '545 



— hooks and plowshares 215 



Prunus Americana 300, 425 



— angustifolia 300 



— cerasifera 300, 428 



— domestica 428 



— fossil .'.... 50 



— hortulana • 300 



— Simonii 276, 300 



— spinosa 52 



— triflora 300 



— umbellata 428 



Pseud-annual 294 



Pseudotsuga Douglasii 326 



Psychological states 23 



Psylla 191 



Pumpkin 137 



Pumpkins and com 259 



Purslane . . 259 



Pyrenees, plants of 269 



Pyrus coronaria 318 



— fossil 50 



— loensis 318 



— Mains 253 



Quack-grass, seed-bearing in ... . 252 



Quadrupeds, number of 139 



Quality, correlatives of ■ 219 



Quebec apples 282 



Quiescence of plants 44, 47 



Quince, nativity of 277 



Rabbits in Australia 200 



Races in apples 240 



Ragweed 259, 260, 261, 262 



Raisin industry 276 



Ranttnculus acris 301 



Raspberries, American .... 312, 361 



— analyses of 235 



— flower-bearing 352 



— hybrid 177 



— quality in 221,225,226 



— successful cultivation of .... 286 

 Raspberry, nativity of 277 



— novelties 367 



— progress in 210 



— propagation 101 



PAGE 



Ray, John, cited 33, 110, 453 



Red pepper, duration of . . 45, 295, 3.31 



Red-root 259, 260, 261 



Religion and evolution 163 



Remnants 98 



Rest in plants 48, 170 



Retrogressive evolution 17 



Reversions 96, 98 



Rhine, example in acclimatization, 324 

 Rhinoceros, in Dakota, etc. . . 271, 272 



Rhizomes 294 



Rhododendrons 285 



Rice, acclimatization 331 



Ricketts, J. H., mentioned 433 



Riley, quoted 139 



Rivers, mentioned 94 



Robin, mentioned 492 



Rogers, E. S., mentioned 433 



Rommel, Jacob 434 



Root, evolution of 41 



Root-grafting, origin of . . . 156 



Roots, Knight on 155 



Rose-chafer 188 



Rose-growing 286 



Roses, Asa Gray on 134-137 



— evolution in 133 



— fossil 50 



— prickles of 51 



— sports in 92, 93, 94 



— sterile 351 



Rotation, to kill weeds, etc. . . 198, 214 



Rowan, Martin, quoted 438 



Running out . 145, 157, 161, 335, 356,376 



et seq. ; 382 et seq. ; 392 et seq. ; 445 



Russia, hardy plants from 327 



Russian cactus 193 



— fruits 317 



— thistle 193 et seq. 



Saccharine qualities 294, 309 



Sachs, quoted 72 



St. Hilaire, mentioned 220 



Salisburia (see Ginkgo). 



Salix Babylonica 327 



Salpiglossis integrifolia 466 



Salsola Kali var. Tragus . • . 193, 199 



Salter, quoted 91 



San Francisco, Tasmanian apples in,215 

 Sargent, Professor, cited 326 



