816 



INDEX, HART II. 



Perichgetium, 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). 

 Peritbecium, 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. 

 Pbelloderm, 208, 213. 

 Pbellogen, 208. 

 Phloem, 170, 181. 

 Phloem-islands, 205. 

 Phosphorescence, 732. 

 Phosphorus, 713. 

 Phototaxis, 747. 



Phototonic effect of hght, 674, 760, 765. 

 Phototonus, 674, 760. 

 Phycocyanin, 221. 

 Phycoerythrin, 99, 221. 

 Pbycopbioin, 221. 

 Phycoxantbin, 99. 

 Phylloclade, 45 (Fig. 26). 

 Phyllode, 49. 

 Pbylloid branches, 684. 

 Phyllopodium, 45. 

 Pbyllotaxis, 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. 

 Pleiochasiura, 35. 

 Pleiomery, 501. 

 Pleiotaxy, 502. 

 Plerome, 146 (Fig. 110). 

 Pleurocarpous, 356. 

 Pleurogynous 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 (Fig. 452). 

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



296 (Fig. 207). 

 Polyadeljihous, 518. 

 Polyandrous, 518. 

 Polyaxial, 489. 

 Polycarpic (Fungi), 286. 

 Polycarpous, 462. 

 Polycyclic, 502 (Fig. 31(5) . 

 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 



gametophyte, 3. 



