MORPHOLOGY, ANATOMY, AXD PHYSIOLOGY. 



593 



Placentation. axile or axillary, 468. 



basal, 469. 



free-central, 469. 



marginal, 468. 



parietal, 468. 



superficial, 468. 

 Plagiotropic members, 222. 

 Plane of symmetry of flower, 448. 

 Planogametes, 59, 240, 256 (Fig. 



146), 268 (Fig. 155). 

 Plasmodium, 63, 276, 283 (Fig 164). 

 Plastic products, 184, 201. 

 Plastic!, 68, 69. 

 Pleiomery, 449. 

 Pleiotaxy, 451. 

 Plerome, 102 (Fig. 83). 

 Pleurocarpous, 333 

 Pleurogynous stigma, 467. 

 Plumule, 404. 

 Pod, 473. 

 Podium, 18. 

 Pollen, development of, 85 (Fig. 61). 



-grain, 51, 396 (Figs. 235, 236). 



-sac, 52, 396 (Figs. 254, 279). 



-tetrads, 396. 



-tube, 407 (Fig. 240), 410 

 Pollination, 409. 



Pollinium, 396, 413 (Fig. 244), 504. 

 Pollinodium, 60, 278, 291 (Fig. 172), 



296, (Fig. 175). 

 Polyadelphous, 462. 

 Polyandrous, 462. 

 Polyaxial, 438. 

 Polycarpous, 418. 

 Polycyclic, 451 (Fig. 267). 

 Polyembryony, 401, 427. 

 Piilviramous, 335, 395. 

 Polyhedron-stage, 253. 

 Polvmerous, 465. 

 Polymorphism, 2, 247. 

 Polypetalous corolla, 458. 

 Polyphyllous, 458. 

 Polysepalons calyx, 458. 

 Polystely, 117. 

 Pol v-vmmetrical, 6, 453. 

 Polysiphonous, 266, 271. 

 Polytomy, 18. 

 Pome, 471. 

 Pom 322 (Fig. 199). 

 Porous capsule, 475 (Fig. 288). 

 Positive geotropism, 169, 218. 

 heliotiopism, 171, 216. 

 hydrotropism, 169, 220. 

 Posterior, 448. 

 Potassium, 188, 192. 

 Potential energy, 197. 

 Prefloration, 43. 

 Prefoliation, 43. 

 Prickle, 48 (Fig. 32). 

 Primary bast, 130. 



M.B. 



Primary bundle, 129. 



differentiation of, 1 :Ti. 



cortex, 102. 



members, 8. 



meristem, 101. 



vascular tissue, 121. 



wood, 129. 

 Primordial cell, 67. 

 Procambium, 116, 126. 

 Procarp, 60, 237, 272 (Figs. 160, 161). 

 Products of metabolism, 200. 

 Proliferation, 55. 

 Promycelium, 299 (Figs. 179, 181). 

 Prophyllum, 57, 443. 

 Prosenchyma, 90 (Fig. 68). 

 Protandrous, 411. 

 Proteids, 186, 201. 

 Proteid crystalloids, 81. 



grains, 80 (Figs. 54-56). 

 Proteolytic enzyme, 198. 

 Prothallium, 2," 349 (Figs. 221, 226, 



233), 405, 407 (Figs. 240, 241). 

 Protogynous, 411. 

 ! Protonema, 309 (Fig. 191). 

 Protophloem, 126 (Fig. 103). 

 Protoplasm, 1, 63, 66, 68. 



continuity of, 65 (Fig. 35). 



properties of, 158. 

 Protoxylem, 126 (Figs. 100-105). 

 Pseudaxis, 19, 441. 

 Pseudo-bulb, 27. 

 Pseudocarp, 414, 471. 

 Pseudo-plasmodium, 283. 

 Pseudopodium, 206, 288. 



of Bryophyta, 312, 339 (Fig. 



206). 



Pulvinus, 30, 220, 225. 

 Pycnidium, 279, 291. 

 Pyrenoid, 71 (Fig. 41), 252 (Fig. 143). 

 Pyxidium, 475 (Fig. 288). 



Quadrant-wall, 314, 346. 

 Quadrilocular anther, 463. 

 Quincuncial, 48. 

 Quinin, 186. 



Raceme, 439. 



Racemose, branching, 19. 



inflorescences, 439 (Fig. 259). 

 Radial arrangement, of members, 12 

 (Figs. 4-8). 



of bundles. 125. 



longitudinal section, 4. 



symmetry, 4 (Figs. 1 and 2), 



453. 



Radiant umbel, 548. 

 Radicle, 404. 

 Ramenta, 364. 

 Raphe, 399 (Fig. 237). 

 Raphides, 81 (Fig. 58), 202. 



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