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, 1 70. 



— 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, 



63S-638. 



— oscillations of tempera- 

 ture, 406. 



— variations in growth, 539, 



541, 549, 556, 559, 560- 

 Periodically motile flowers, 



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. 



Peronospora •viticola, 786. 



Peronosporese, 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 nyctaginiftora, 178. 



Peziza convexula, 98. 



PhaeosporesE, 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 m, 178. 



oxalate in, 175. 



Phanerogams, cell-division 

 in, 435. 



— and cryptogams com- 

 pared, 751, 756. 



— dormant periods, 352. 



— embryos of, 443. 



— epidermis of, 116. 



— 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. 



— multiflorus, 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. 



— grandifolia, 316. 

 Phloem, 45, 131, 157, 160, 



330, 355, 360. 



— general characters of, 1 3 3 . 



— parenchyma, 160, 163- 



— rays, 159. 



— of roots, 168. 

 Phmnix 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. 

 Phy corny ces, 569, 700, 719. 



— 701. 



— nitens, 561. 



5, 280. 



Phycomycetes, 34, 732. 



Pkyllanthus, 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. 

 Physalis, 780. 

 Physarum album, 613. 

 Physcia parietina, 392. 

 Physcomitrium fasciculare, 



780. 



— pyriforme, 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 infestans, 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, U8, 143. 



— Pinea, 327, 753. 



— sylvestris, 112. 



160, 236. 



Piperaceae, 180, 231, 465. 

 Piptocephalis Freseniana, no, 



725, 726. 



370, 725. 



Pistaeia terebinthus, 181. 

 Pisum sativum, 56. 



17,333. 



Pitcher-plants, 378, 659. 

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



572, 574, 581, 630, 634. 



