624 



BOTANY 



Phycomyces, 349 



Phycomycetes, 341, 343 



Phycophsein, 58, 330 



Phylloclades, 24, *25, *261 



Phyllodes, 36, *46, 194, 254 



Pliylogeny, 145, 154 



Physcdis, 581 



Physical attributes, 160, 167 



Physiology, 6, 159 



Physodes, 55 



Physostigma, 562 



Physostigminum, 562 



Phytelephas, 81, 205, 473 ; endosperm, 



*458 

 Phyteuma, 592 



Phytolacca, 509 ; bundles, 117 

 Phytolaccaceae, 509 ; thickening, 137 

 Phytophthora, 344, *345 

 Phytoteratology, 154 

 Phytotomy, 10 



Picea, *435, *436, 440 ; resin, 88 

 Picraena, 535 

 Pigeon Berry, Phytolacca 

 Pigweed, Ghenopodium 

 Pilacre, 363, 368 

 Pileus, 368, 370 



Pilobolus, 349 ; heliotropic, 252 

 Pilocarpin, 206 

 Pilocarpus, 535 

 Pilostyles, 209 

 Pilularia, *407, 411 

 Pimpernel, Anagallis 

 Pimpinella, *546, 549, 550 

 Pinaceae, 439 

 Pine, Firms 



Pine-apple, Bromeliaceae 

 Pinguicula, 584 ; trap, 215 

 Pink, Dianthus 

 Pinnate leaves, 30, 31 

 Pinnularia, *11 

 Pinus, 438, *441 ; wood, *76, *123, *126, 



*127, *128, *129 ; sieve-tubes, *77, 



"86 ; attacked by Iieterobasidia, 371 

 Piper, 503, *504 ; ethereal oil, 73 ; 



bundles, 117 

 Piperaceae, 503 

 Pipe- Vine, Aristolochia sipho 

 Pirns, *451, *553, *554, 555 ; periderm, 



*141 ; lenticles, 142 ; attacked by 



Gymnosporangium, 351 

 Pistacia, 535 

 Pistil, *449 



Pisum, *560, 562 ; leaf-tendrils, *36 

 Pith, see Medulla 

 Pits, 76, 77 

 Pitted vessels, 85 

 Pix liquida, 442 

 Placentation, *449 

 PlagiochUa, 390 ; form, *14 

 Plagiotropic, 250 

 Plankton, 314 



Planogametes, 318 



Plantaginaceae, 584 



Plantago, *584, 585 ; triaxial, 27 ; bundles, 



101 ; protogyuy, *286 

 Plantain, Plantago 

 Plantain, Water, Alisma 

 Plasmodium, 50, 303, 305 ; absorption, 



176 ; movement, 242 

 Plasmolysis, 167 

 Plasmopara, 345 

 Platanaceae, b51 

 Platanthera, 489 

 Platycerium, 227 

 Pleiochasium, 461 

 Pleiotaxy, 452 

 Plerome, 150 

 Pleurococcus, 323 

 Pleurorrhizeae, 519 

 Pleurosigma, 314 

 Plum, Pncnus 



Plumbaginaceae, Plumbago, 571 

 Plumule, *456 

 Poa, 278, 480 

 Pod, see Legume 

 Podetium, 379 

 Podophyllinum, 516 

 Podophyllum, 516 

 Podospora, *356 

 Pokeweed, Phytolacca 

 Polarity, 226, 227 

 Polemoniaceae, 577 

 Pollen-grains, -sacs, -cells, *429, *430 ; 



-tubes, 66, 431, 456 ; chambers, 438 

 Pollination, 282 



Pollinium (Pollinarium), *488, 576 

 Polyarch, 113 

 Polycarpicae, 509 

 Polycarpum, 285 

 Polyembryony, 279, 457 

 Polygala, Polygalaceae, *533, 534 

 Polygamous flowers, 428 

 Polygonaceae, 504 ; stipules, 32 

 Polygonatum, *463 ; rhizome, *22 ; sym- 



podium, 18 

 Polygoninae, 503 

 Polygonum, 504 ; ovary of, *455 ; attacked 



by Pnccinia, 367 

 Polyhedra, 320 

 Polypodiaceae, 402 

 Polypodium, 402, 404, *405, *406 

 Polyporeae, 370 

 Polyporus, 370, *371, 373 

 Polysymmetrical plants, 16 

 Polytomy, 17 



Polytrichum, 391, 392, 394, *395 

 Pomaceae, phellogen, 140 

 Pomegranate, Punica 

 Pomoideaei 228, 554 

 Pond-weed, Potamogeton 

 Poor-man's Weather-glass, Anagallis ar- 



