Plane Tree, 202 Planera, 432 Plantain, 419, 442 Platylobium, 40 Plum, 63 Plumbago, 418 Plumule, 192 Podetia, 468 Podolobium, 40 Podophyllum, 253 Poet’s Cassia, 427 Polemonium, 406 Polianthes, 446 Pollen, 6 Polygala, 285 Polygonum, 423 Polyphore, 55 Polypodium, 462 Polypody, ib. Polytrichum, 467 Pomegranate, 352 Pomes, 67 Pontederia, 452 Pond Weed, 455 Poplar (_fig._ 82), 185 Poppy Tribe, 259 Porte-chapeau, 345 Port Famine Fuchsia, 78 Portugal Laurel, 65 Portulaca, 364 Port wine, 421 Potentilla, 54 Prickles, 53 Prickly Ash, 341 Prickly Pear, 371 Prickly Poppy, 265 Pride of India, 328 Primrose, 417 Primula, ib. Prinos, 345 Privet (_fig._ 65), 136 Protea, 425 Psidium, 359 Ptelea, 341 Pteris, 462 Pulmonaria, 409 Pultenæa, 40 Punica Granatum, 352 Purging Buckthorn, 345 Purslane, 364 Pyrola, 132 Pyroligneous acid, 209 Pyrus japonica, 70 Q. Quamoclit, 407 Quassia, 342 Queen’s Needlework, 59 Quercus, 190 Quillaja, 351 Quillwort, 464 Quince, 70 Quisqualis indica, 353 R. Rafflesia, 429 Ragged Robin, 293 Ranunculaceæ, 239 Ranunculus, 10 Raphiolepis, 71 Raspberry (_fig._ 23), 56 Reaumuria, 367 Receptacle, 5 Red Cedar, 227 Red Clover, 40 Red German Catchfly, 293 Red Root, 346 Red-wood Tree, 314 Reed-mare, 453 Reindeer Moss, 469 Reseda, 271 Restiaceæ, 456 Retziaceæ, 407 Rheum, 423 Richardia, 454 Rhinanthus, 412 Rhipsalis, 371 Rhizoboleæ, 327 Rhizophora, 353 Rhododendron (_figs._ 57 and 58), 121 Rhodora canadensis, 127 Rhubarb, 423 Rhamnus, 345 Rhus, 349 Ribes, 372 Rib-grass, 419 Rice, 458 Ricinus, 431 Ringent corolla, 413 Rivinia, 421 Robinia, 35 Rock Rose, 275 Rock Lychnis, 293 Rocket Larkspur, 31 Roman Nettle, 160 Rondeletia (_figs._ 37 and 38), 90 Rosaceæ, 350 Rose (_figs._ 20-22), 51 Rose Apple, 359 Rose Campion, 293 Rubiaceæ, 85, 386 Rue, 340 Ruellia, 415 Rumex, 423 Ruscus, 448 Rush, 456 Ruta, 340 Rye, 458 S. Saccharum, 459 Sacred Bean of India, 258 Saffron, 445 Sage, 412 Sagittaria, 437 Sago Palm, 453 Sagus Rumphii, ib. Salicornia, 422 Sallow, 184 Salpiglossis, 150 Salsola Kali, 422 Samara, 317 Sambucus, 382 Samydeæ, 346 Sandal-wood, 427 Sapindaceæ, 327 Saponaria, 292 Sapoteæ, 399 Sarracenia, 259 Sarsaparilla, 448 Sassafras, 424 Savin, 227 Saxifrage, 377 Scabious, 389 Scaly bracts, 108 Schinus, 347 Schizandra, 247 Schizanthus, 151 Schubertia, 225 Scilla, 449 Scirpus, 457 Scitamineæ, 441 Scleranthus, 365 Scolopendrium, 462 Scotch Pine (_figs._ 93 & 94), 209 Screw Pine, 453 Screw Tree, 300 Scrophularinæ, 411 Scyphæ, 469 Sea Buckthorn, 428 Sea Lavender, 418 Sea Weeds, 471