INDEX, 
975 
Phellogen, 82, 107 (Fig. 90). 
Philadelpheae, 661. 
Philodendron, 93. 
Phloem, III, 119. 
Phloem-ray, iii, 131. 
Phloem-sheath, 440, 468. 
Phlomis, 564 (Fig. 390). 
Phoenix, 618 (Fig. 419). 
Phosphorescence, 723. 
Phosphorus, 696, 699. 
Phütotactic, 752. 
Phototonus, 757, 885. 
Phragmidium, 332. 
Phycocyanine, 246, 766. 
Phycoerythrine, 289, 766. 
Phycomyces, 265, 267 (Fig. 
174). 
Phycophaeine, 283. 
Phycoxanthine, 260, 766. 
Phyllactidium, 329. 
Phyllanthacese, 661. 
Phyllantheae, 661. 
Phyliiscium, 328. 
Phylloclade, 217. 
Phyllocladus, 158, 217, 509, 
510, 527. 
Phyllade, 476. 
Phyllode, 222^ 
Phylloglossum, 462, 463. 
Phyllome, 150, 157. 
Phyllophoraceae, 289. 
Phyllophyte, 151. 
Phyllopode, 484. 
Phyllotaxis, 187, 194, 953 
(Figs. 146-154). 
Phyllotaxis of Ligulatae, 476. 
Physalis, 638. 
Physarum (Fig. 173). 
Physcia, 327 (Fig. 222). 
Physma, 327 (Fig. 222). 
Phytelephas, 587. 
Phytocrene, 653, 950. 
Phytolacca, 645, 653 (Fig. 
459)- 
Phytolaccaceae, 136, 645, 
- 661. 
Phytophthora, 275. 
Picea, 517. 
Pileus, 336, 337. 
Pilobolus, 267. 
Pilularia, 31, 451, 455, 457, 
458, 460 (Figs. 33, 318, 
320, 322-324). 
Pine-apple, 614. 
Pinus, 25, 30, 72, 74, 94, 105, 
124, 508, 527, 533 (Figs. 
23, 24, 32, 60, 78, 88, 102, 
103, 346, 356). 
Piperaceae, 137, 492, 496, 
564, 573, 575, 633, 654, 
656, 951. 
Piperinese, 655. 
Piptocephalidse, 267, 955 
Pistia, 585, 628. 
Pisum, 52 (Fig. 46). 
Pitcher-like organs, 677. 
Pith, 120. 
Pitted vessels, 24, 116 (Figs. 
25-27, 97). 
Pittosporeae, 93, 660. 
Placenta, 452, 492, 574. 
Placentation, 561, 563. 
Plagiotropic, 854, 954. 
Plane of insertion, 188. 
Plane of symmetry, 204. 
Plantaginese, 643, 658 (Fig. 
447). 
Plasmodium, 10, 39, 252, 262, 
841, 955. 
Platanacese, 656. 
Platanus, 639. 
Platycerium, 170, 432. 
Pleomorphy, 232. 
Pleon, 664. 
Pleospora, 316. 
Plerome, 115, 147, 163, 500, 
952 (Fig. 114). 
Plerome sheath, 115, 124, 
415 (Fig. 96). 
Pleurocarpous Mosses, 370. 
Pleurococcus, 246, 253, 329. 
Plocamium, 289. 
Plumbagincse, 659. 
Plumule, 499, 593. 
Podocarpeae, 527. 
Podocarpus, 500, 510, 527. 
Podophyllum, 647. 
Podosphaera, 238, 3.12. 
Podostemoneae, 662. 
Point of insertion, 188. 
Polanisia, 605 (Fig. 412). 
Polar nuclei, 580. 
Polarised light, 665. 
Polem'oniaceae, 658. 
Pollen, Development of, 12, 
14, 15, 32, 505, 551, 552 
(Figs. 12, 34, 374, 375, 
378, 379). 
Pollen-grain, 23, 34, 224, 
487, 491, 498, 506, 514, 
553, 555, 900 (Figs. 36, 
345, 350, 351, 378, 380, 
381). 
Pollen-sac, 491, 505, 512, 
542, 551, 552, 556 (Figs. 
374, 377). 
Pollen-tube, 33, 515, 522, 
554, 568 (Figs. 35, 345, 
354, 355, 37Ö, 395). 
Po lination, 494, 583. 
PoUinium, 557, 913. 
Pollinodium, 236, 307, 309, 
312, 313, 898 (Figs. 204, 
207). 
Polyblastia, 329. 
Polycarpae, 631, 657. 
Polycarp.llary, 561. 
Polycarpic, 594. 
Polycarpous, 560. 
Polychidium, 328. 
Polycyclic, 601. 
Polyembryony, 526, 593. 
Polygala, 136, 612 (Fig. 417). 
Polygalaceae, 136, 653, 660. 
Polygamous, 535, 905. 
Polygamy, 905. 
Polygonaceae, 493, 565, 662. 
Polygonatum, 186, 619 (Figs. 
143, 420). 
Polygonum, 580, 638, 930. 
Polypodiaceae, 391, 421, 441, 
Polypodies:, 441. 
Polysymmetrical, 204, 611. 
Polytrichum, 365, 366, 368, 
384 (Fig. 273). 
Pomeae, 662. 
Pomegranate, 616. 
Pontederiaces, 632. 
Populus, 637, 640. 
Pore-capsule, 616. 
Porlieria, 651. 
Porocyphus, 328. 
Portulacaceae, 661. 
Posterior, 600. 
Potamogeton, 625, 630. 
Potamogetoneae, 586, 631. 
Potassium, 696, 699. 
Potato, 50, 59. 
Potentilla, 609, 651. 
Pottia, 361. 
Pressure, Effect of, on 
growth, 809. 
Prickle, 100. 
Primary bast, 650. 
Primary cortex, 127,1 30, 532, 
649. 
Primary endosperm, 582. 
Primary fibro - vascular 
bundle, 129, 649. 
Primary meristem, 80, 82, 
137. 
Primary root, 164, 166. 
Primary tissue, 80. 
Primary wood, 53 t, 650. 
Primine,57i (Figs. 397, 398). 
Primordia, 609. 
Primordial cell, 5. 
Primordial epidermis, 147. 
Primordial utricle, 42. 
Primulaceae, 493, 565, 574, 
644, 659 (Fig. 456). 
Primulineae, 659. 
Procambium, 1 10. 
Products — 
of degradation, 705. 
of degradation of chloro- 
phyll, 47. 
Pro-embryo, 293 (Fig. 191). 
Pro-embryonic branch, 296. 
Prolification, 490, 503. 
Pfomyceiium, 330(^Fig. 224), 
/ 
