838 



INDEX. 



Relations between tendrils 

 and supports, 666. 



twining plants and 



supports, 668, 671. 



Relative lengths of separ- 

 ated tissues, 570. 



Renewal of vegetation, 411. 



Reproduction, 9, 721, 723, 



749- 



— asexual, 728, 798, 799. 



— sexual, 725, 728, 733, 



770, 798-800. 



— vegetative, 769. 



— of angiosperms, 756. 



— replacement of sexual by 

 asexual, 802. 



Reproductive cells, 724, 732, 

 767. 



mutual attraction be- 

 tween, 772-778. 



— organs, 8, 368, 465, 534, 

 721-724, 735, 739, 741, 

 745, 757, 779- 



position ot, 787. 



Reseda odorata, 497. 



Reserve-materials, 24, 156, 



176, 284, 299, 310, 312, 



317, 319, 326, 328, 332, 



341, 345, 357, 363, 366, 



373, 411, 462, 508, 521, 



531, 534, 535, 539, 564- 



employment of, 360, 



364. 



exhaustion of, 326, 



327. 



forms of, 332, 344. 



metamorphoses of, 



341. 



re-invigoration of, 342, 



352. 



in seeds, 332. 



storage of, 330, 364. 



translocation of, 320, 



360. 



Reservoirs of reserve- 

 materials, 326, 330, 335, 

 340, 343, 358, 360, 508, 

 535. 



Resin, 124, 126, 172, 175. 



passages, 181, 327. 



vesicles, 179. 



Resinous substances, 163, 

 182. 



Resins, 183, 362, 403. 



Resistance to extreme tem- 

 perature, 192. 



Respiration, 294, 298, 300, 

 326, 395, 402, 539, 595. 



— 398. 



— of animals, 395, 397, 401, 



406. 



— carbon dioxide of, 397, 

 399- 



— chemistry of, 402. 



Respiration, destruction of 



organic substance by, 



400, 402. 

 ■ — diminution of weight 



owing to, 300, 313, 327, 



400. 



— energy of, 396, 397, 399. 



— evolution of heat in, 403, 

 405. 



— experiments in, 397. 

 in "vacuo, 401. 



— in fatty seeds, 400. 



— of fungi, 385, 398, 401. 



— of green organs, &c., 397, 

 400, 406. 



— and growth, 399. 



— importance of, 396. 



— intramolecular, 395, 401, 

 402. 



— light produced by, 406, 

 408. 



— magnitude of, 399. 



— of parasites, 399. 



— in protoplasm, 401. 



— quantitative experiments 

 on, 399. 



— significance of, 402, 403. 



— specific, 400. 



— temperature of, 397. 



— water of, 397, 400. 

 Resting spores, 351. 

 Retardation of growth, 199. 

 by light, 535, 559, 



561. 

 Retention of salts by soil, 

 261. 



— of water by soil, 258. 

 Reticulate thickening, 92. 



— vessels, 136, 160. 



Reversion of hybrids, 784. 



Revolving nutation of ten- 

 drils, 657, 661, 664, 666, 

 667. 



of twining plants, 657, 



669, 670. 

 Rhamma, 266. 



— cathartica, 57, 425. 

 —frangula, 162, 229. 

 Rheum, 485. 



— undulatum, 466. 

 Rhinanthus, 28, 367, 369. 

 Rhizines, 35. 

 Rhizocarpes, 492, 495. 



— reproduction of, 745, 756. 

 Rhizoids, 23, 29, 35, 365, 



453- 



Rhizomes, 60, 326, 330, 332, 

 478, 506, 534, 536, 565, 

 571, 701, 721, 739- 



Rhizomorpha, 388, 407, 695. 



Rhizophores, 22, 25. 



Rhododendron, 780. 



- — ferugineum, 185. 



Rhodora, 780. 



Rhodospermin crystals, 335. 

 Rhubarb, 51, 186, 216, 465, 

 571- 



— 485. 



Rhynchonema, 787. 

 Ribes, 124, 186. 



— nigrum, 165. 

 Ribesacese, 780. 

 Rice, 337. 



Ricinus, 177, 181, 227, 271, 

 326, 334, 347, 373, 375, 

 513, 574, 699- 



— 158. 



— co)nmunis, 313. 



133, 136, 334, 374, 



764. 

 Rigidity of organs, 217, 631, 



657. 



— of plants due to absence 

 of oxygen, 396, 402. 



— of tissues, 218, 565, 569. 

 Rigor in irritable organs, 



593-596, 628. 

 Ring-bark, 166. 

 Ringing of trees, 229. 

 Ripening of fruits, 320. 



— of seeds, 320, 323. 

 River-water, 288. 

 Robinia, 199, 285, 319, 425, 



478, 581, 623, 649, 656. 



— pseudacacia, 21, 42. 

 Rocks, disintegration of, 



264. 



Rolled-up dorsiventral or- 

 gans react like radial 

 ones, 706-709. 



Root, 3, 113, 266, 275, 284, 

 298, 329, 330, 335, 344, 

 416, 417, 418, 423, 424, 

 447, 451, 456, 460, 467, 

 474, 478, 482, 485, 486, 

 491, 492, 505, 508, 512, 

 513, 520, 528, 547, 563, 

 564, 567, 569, 579, 582, 

 583, 678, 689, 690, 703, 

 723. 



— absorption by, 246, 253, 

 287. 



— activity of, 264. 

 ^ adventitious, 477. 



— cambium of, 168. 



— degraded, 369. 



— development of, 15, 418, 

 470, 522. 



— entrance into soil, 256, 

 545, 583, 692,702. 



— functions of, 16, 255. 



— geotropism of, 679, 680, 

 689-691. 



— growing-points of, 476, 

 689. 



— growth of, 17, 423, 539, 



541, 543, 544, 553- 

 in thickness, 155, 168. 



