INDEX. 



825 



Periblem, 420. 

 Pericambium, 169. 

 Pericarp, 147. 

 Periclines, 439, 440, 445, 



449, 452, 454, 457, 458, 



469, 743, 764- 



— in solid organs, 447. 



— sequence of, 443, 



— suppression of, 442. 

 Periderm, 45, 165, 226, 246, 



574- 



— of monocotyledons, 170. 



— of roots, 169. 

 Perigone, 736. 



Period of vegetation, 411, 

 Periodic movements, 395, 



623, 625, 627, 628, 635, 

 636, 640, 641. 



■ spontaneous, 590, 593, 



594, 598, 599, 627, 628, 

 635-638. 



— oscillations of tempera- 

 ture, 406. 



— variations in growth, 539, 



541, 549, 556, 559, 560. 

 Periodically motile floM^ers, 



396, 599, 623, 625, 641. 

 Periodicity, 199, 351, 537, 



599, 623. 



— of growth, 558-560, 599. 



— of movements, 623, 626, 

 635-638. 



— of root-pressure, 273, 599. 

 Peripheral growth, 158. 

 Peristome, 150, 739. 

 Permanent tissue, 419, 425, 



440, 465, 467, 479. 



conversion of embry- 

 onic into, 466. 



converted into embry- 

 onic tissue, 480. 



Perotiospora I'iticola, 786. 



Peronosporeae, 370, 390,777. 



Petals, 497. 



Petasites albus, 52. 



Petiole, 53, 471, 482, 506, 

 547, 569, 571, 575, 623, 



624, 626, 630, 633, 639, 

 644, 646, 693, 



Petioles as tendrils, 659, 663. 



Petroleum, 294. 



Petunia nyctaginiflora, 178. 



Peziza cowvexuln, 98. 



Phacosporea", 429, 435. 



Phajus, 316. 



Phallus impudicus, 428. 



— 427. 



Phanerogams, 492, 496, 497, 

 508, 512, 538, 620, 621, 

 623, 746, 748, 751, 754, 

 756, 771, 778, 789, 790, 

 798. 



— calcium carbonate in, 1 78. 



— —oxalate in, 175. 



Phanerogams, cell-division 

 in, 435. 



— and cryptogams com- 

 pared, 751, 756. 



— dormant periods, 352. 



— embryos of, 443. 



— epidermis of, 11 6. 



— fertilisation, 108. 



— growing point, 458, 468. 



— hybrid, 780. 



— laticiferous vessels of, 171. 



— parasitic, 476, 511, 534. 



— parasitism of, 368, 370, 



372. 



— receptacles for secretions, 



176. 



— respiration, 408. 



— saprophytic, 371, 511. 



— seedless, 802. 



— tissues of, 149. 



— vascular bundles, 126. 

 P bar bit is bederacea, 672. 

 Phaseolus, 56, 179, 193, 283, 



531, 533, 593, 625,669. 



— multißorus, 90, 136, 168, 

 629, 704. 



194, 313, 505, 540, 



542, 543- 



— vulgaris, 629. 



— 629. 



Phases of growth, 411, 414, 

 416, 420, 423,425,437. 



the three, 414, 417, 



418,424. 



Phelloderm, 166. 



■ — of roots, 169. 



Phellogen, 165. 



Philodendron, 25, 316, 571. 



— gratidifolia, 3 1 6. 

 Phloem, 45, 131, 157, 160, 



330, 355, 360. 



— general characters of, 133. 



— parenchyma, 160, 163. 



— rays, 159. 



— of roots, 168. 

 Phcenix dactylifera, 344. 

 Phosphates, 202, 226, 253, 



254, 262, 284, 287, 334. 

 Phosphorescence, 395, 406. 



— its dependence on oxy- 

 gen, 407, 408. 



Phosphoric acid, 79, 260,320, 

 385. 



— in sap, 274. 

 Phosphorus, 289, 290, 383. 

 Photometric methods, 301, 



554- 

 Phototonus, 594, 628, 635. 

 - — of swarmspores, 612. 

 Phycomyces, 569, 700, 719. 



— 701. 



— nitens, 561. 



5, 280. 



Phycomycetes, 34, 732. 



Pbyllanthus, 55, 511. 

 Phyllocactus, 54, 511, 780. 



— Phyllanthus, 781. 

 Phyllocladus, 55. 

 Phyllotaxis, 483, 486, 487, 



493, 494, 495, 496, 499, 

 500, 501, 714- 



Phylloxera, 784, 786. 



Physolis, 780. 



Physarum album, 613. 



Physcia parietina, 392. 



Physcomitrium fasciculare, 

 780. 



• — pyrifornie, 780. 



Physiological classification 

 of products of metabol- 

 ism, 323, 329. 



— labour, 171. 



— nature of organs, cell- 

 division independent of, 



433, 435- 

 • — significance of respiration, 



403. 

 Physiology, 189, 414, 515, 



650. 

 Physma chalaganum, 392. 

 Phytelephas, 335, 344, 763. 

 Phytophthora itifestans, 369, 



381, 390. 

 Picea excelsa, 581. 

 Pigment-bacteria, 387. 

 Pilea, 790. 

 Pileus, 427, 700. 

 Pilobolus, 335. 

 Pilostyles, 370. 

 Pilularia, 44, 494, 608. 



— globulifera, 493. 



Pine, 37, 75, 166, 180, 225, 

 237, 266, 268, 327, 369, 

 389, 464, 472, 500, 579, 

 581, 584, 703, 754, 756. 



— 420, 464. 



cone, 499, 758. 



wood, 327. 



Pinguicula, 124, 335, 378, 

 706. 



— 'vulgaris, 435. 



Pinus, 182, 321, 351, 465, 

 678. 



— austriaca, 581. 



— Pinaster, 118, 143. 



— Pinea, 327, 753. 



— sylvestris, 112. 



160, 236. 



Piperacex, iSo, 231, 465. 

 Piptocephalis Freseniana, 370, 



725, 726. 



370, 725. 



Pistacia tcrebinthus, 18 I. 

 Pision satii'um, 56. 



17, 333. 



Pitcher-plants, 378, 659, 

 Pith, 230, 359,564,569,571, 



572, 574, 581, 630, 634. 



