MORPHOLOGY, ANATOMY, AND PHYSIOLOGY. 



817 



Potential parasites, 711. 



saprophytes, 711. 

 Prefloration, 59. 

 Prefoliation, 59. 

 Prickle, 66 (Fig. 41). 

 Primary bast, 181. 

 bundle, 180. 



differentiation of, 175. 

 desmogen, 151, 176. 

 cortex, 160, 207, 213. 

 members, 15. 

 meristern, 145. 

 root, 15, 373. 

 shoot, 15. 

 wood, 176, 180. 

 Primordial cell, 94. 

 Procambium, 151, 176. 

 Procarp, 83, 220, 225, 228, 268 (Figs. 



194, 195). 



Products of metabolism, 670, 727. 

 Progressive succession, 23. 

 Proliferation, 76. 



Promycelium, 279, 289 (Fig. 200), 305 



(Fig. 215), 307 (Figs. 217, 218). 



Prophyllum, 79, 493, 505 (Figs. 519, 



520). 

 Prosenchyma, 131 (Fig. 90), 132, 190, 



196. 



Protandrous, 454. 

 Proteids, 707, 720, 724, 727. 

 Proteid crystalloids, 112, 707. 

 grains, 112 (Figs. 68-70). 

 Proteolytic enzyme, 680, 724. 

 Prothallium, 372, 375, 397 (Figs. 263- 

 265), 413 (Fig. 270), 423 (Fig. 

 276), 428 (Fig. 278), 448 (Figs. 

 289, 290), 450 (Figs. 291, 292). 

 Protocorm, 421, 424. 

 Protogynous, 454. 

 Protonema, 14, 324 (Fig. 232), 333, 



354, 365 (Fig. 249). 

 Protophloem, 167 (Fig. 130), 176. 

 Protoplasm, 4, 89, 93, 95. 



continuity of, 91 (Fig. 45). 

 properties of, 667, 764. 

 Protoxylem, 167 (Fig. 130), 176 (Fig. 



135). 



Pseudaxis, 33, 35, 492. 

 Pseudo-bulb, 44. 

 Pseudoearp, 458, 528. 

 Pseudogamy, 777. 



Pseudo monocotyledonons embryo,445. 

 Pseudo-plasmodium, 283. 

 Pseudopodium, 69, 283. 



of Bryophyta, 328, 357, 362, 364 



(Fig. 248) 



Pulvinus, 46, 755, 761. 

 Pycnidium, 75, 278, 296. 

 Pyrenoid, 100 (Figs 54, 55), 241, 244, 



353. 

 Pyrenin, 96. 



Pyxidium, 531 (Fig. 342), 653. 



Quadrant-wall, 329, 372. 

 Quadrilocular anther, 519. 

 Quincuncial, 60. 

 Quinin, 707. 



Eaceme, 490. 



Racemose inflorescences, 490 (Fig. 



309J. 

 Radial arrangement, of members, 21 



(Figs. 11-15). 

 longitudinal section, 7. 

 of bundles, 175. 

 symmetry, 8, 9 (Fig. 2), 507. 

 Eadiant umbel, 624. 

 Eadicle, 446. 

 Eamenta, 395. 

 Eaphe, 437 (Fig. 284). 

 Eaphides, 113 (Fig. 72), 729. 

 Eate of growth, 738, 745 (Fig. 480 j. 

 Eeceptacle, 76, 85, 268, 325, 357, 494. 

 Eeceptive spot, 102, 116, 227. 

 Eeciprocal hybridisation, 775. 

 Regular flower, 507. 

 Region of elongation, 738, 761. 

 Rejuvenescence of cells, 115 (Fig. 74). 

 Eeplum, 531 (Fig. 342), 603. 

 Eeproduction, 67, 670, 766. 

 Reproductive organs, 67. 

 asexual, 70. 

 sexual, 79. 



property of protoplasm, 667. 

 Reserve materials, 727. 

 Eesin, 709, 728. 

 Eesin-ducts, 140 (Fig. 102), 466. 



-sac, 140 (Fig. 104). 

 Eespiration, 669, 722, 726. 

 Eesupinate, 511, 563. 

 Eetardation of growth by light, 674. 

 Reticulate vessels, 104. 

 Retinaculum, 456, 565. 

 Reversion, 779. 

 Rhachis, 76. 

 Rhipidium, 36. 

 Rhizine, 274, 322 (Fig. 229). 

 Rhizogenic cells, 187, 373, 395. 

 Rhizoid, 324, 355. 

 Rhizome, 42 (Fig. 23). 

 Rhizophore, 427. 

 Rib, 51. 

 Ricinolein, 708. 

 Ring, 79, 417 (Fig. 272). 

 Rise of temperature in germinating 



seeds, 732 (Fig. 476). 

 Roots, 5, 7, 61 (Fig. 39). 

 adventitious, 62, 189. 

 aerial, 63, 155 (Fig. 117), 682. 

 branching of, 62, 186 (Fig. 142). 

 functions of, 680. 

 primary, 62. 



