816 



INDEX, PART II. 



Perichaetium, 85, 336. 



Periclinal, 145. 



Pericycle, 151, 168 (Figs. 130, 131). 



Periderm, 132, 208, 210 (Fig. 155). 



Peridiolum, 318. 



Peridium, 312. 



Perigynium of Carex, 552. 



of Liverworts, 338 (Fig. 235). 

 Perigynous, 495 (Fig. 310). 

 Perinium, 118, 292, 410. 

 Periodicity of growth, 738, 745 (Fig. 



480). 



Periplasm, 291. 

 Perisperm, 440, 458 (Fig. 295), 561, 



594, 599. 



Peristome, 361, 368 (Fig. 252). 

 Perithecium, 295, 299. 

 Permanent tissue, 131. 

 Personate, 511. 

 Petal, 79, 494, 691. 

 Petaloid, 79. 

 Petiole, 45, 48, 690. 

 Petiole-climbers, 591, 614, 690 (Fig. 



473), 743. 



Phelloderm, 208, 213. 

 Phellogen, 208. 

 Phloem, 170, 181. 

 Phloem-islands, 205. 

 Phosphorescence, 732. 

 Phosphorus, 713. 

 Phototaxis, 747. 



Phototonic effect of light, 674, 760, 765. 

 Phototonus, 674, 760. 

 Phycocyanin, 221. 

 Phycoerythrin, 99, 221. 

 Phycophsein, 221. 

 Phycoxanthin, 99. 

 Phylloclade, 45 (Fig. 26). 

 Phyllode, 49. 

 Phylloid branches, 684. 

 Phyllopodium, 45. 



Phyllotaxis, 27. 



of flower, 496. 



Physical functions of tissues, 674. 

 Physiology, 666. 

 Physiological differentiation, 2. 

 Pileus, 310 (Figs. 221, 222). 

 Piliferous layer, 158. 

 Pinna, 52. 



Pinnate, 50 (Fig. 30). 

 Pinnule, 52. 

 Pistil, 521. 

 Pitcher, 690. 



Pith, 151, 166 (Fig. 130), 169. 

 Pitted wall, 105 (Figs. 59, 61), 128 

 Placenta, 72, 374, 390, 408, 436, 524. 

 Placental scale, 469. 

 Placentation, 524 (Fig. 338) 



axial, 525. 



axile or axillary, 524. 



basal, 525. 



Placentation, free-central, 525. 



marginal, 524. 



parietal, 524. 



superficial, 524. 

 Plagiotropic members, 758. 

 Plane of symmetry of flower, 507. 

 Planogametes, 81, 225, 247 (Figs. 176, 



177), 261 (Fig. 187). 

 Plasmodium, 89, 274, 283 (Fig. 198). 

 Plastic products, 670, 727. 

 Plastid, 95, 97. 

 Pleiochasium, 35. 

 Pleiomery, 501. 

 Pleiotaxy, 502. 

 Plerome, 146 (Fig. 110). 

 Pleurocarpous, 356. 

 Pleurogvnous stigma, 524. 

 Plumule, 20, 446. 

 Pod, 531. 

 Podium, 33. 



Polar bodies, 82, 772. . 

 Pollen-chamber, 470. 



development of, 125 (Fig. 85). 



-grain, 70, 434 (Fig. 282), 447 

 (Fig. 288), 520. 



-sac, 71, 189, 433 (Fig. 281). 



-tetrads, 434, 564. 



-tube, 14, 86, 435 (Fig. 283), 449 



(Fig. 289, 290), 457, 527. 

 Pollination, 452, 774. 

 Pollinium, 434, 456 (Fig. 294), 564, 



651 (Fitf. 452). 

 Pollinodium, 83, 276, 291 (Fig. 202) 



296 (Fig. 207). 

 Polyadelphous, 518. 

 Polyandrous, 518. 

 Polyaxial, 489. 

 Polycarpic (Fungi), 286. 

 Polycarpous, 462. 

 Polycyclic, 502 (Fig. 316). 

 Polyembryony, 441, 471, 770. 

 Polygamous, 358, 432, 515. 

 Polyhedron -stage, 242. 

 Polymerous, 522. 



Polymorphism, 2, 4, 231, 244, 278 

 Polypetalous corolla, 514. 

 Polyphyllous, 514. 

 Polysepalous calyx, 514. 

 Polystely, 146, 152. 

 Poly symmetrical, 9, 507. 

 Polysiphonous, 259. 267. 

 Pome, 528. 

 Pore, 339 (Fig. 241). 

 Porous capsule, 532 (Fig. 342). 

 Positive geotropism, 682. 



heliotropism, 685, 750. 



hydrotropism, 683, 755. 

 Posterior, 499. 

 Potassium, 714, 717. 

 Potential energy, 668, 718, 731 



gamptophyte, 3, 



