Proteids,79,i72,i7S,2o6,284, 

 289, 290, 307, 318, 323, 

 329, 332, 334) 341, 348, 

 349> 355, 361, 363, 369, 

 381, 384, 387, 400, 401, 

 403, 422, 566, 763. 



— circulating, 325. 



— decomposition of, 402. 



— fermentation of, 342, 345. 



— in sap, 274,333. 



— metamorphoses of, 326. 



— origin of, 324, 346. 



— and respiration, 402. 



— in sieve-tubes, 325. 

 Prothallia, 742, 743, 744, 



747-750, 752, 755, 800. 

 Protiiallus, budding from, 

 801. 



— of fern, 458,461,466,491, 

 525, 619, 772-774, 788, 

 789, 



— reduced, 756, 760, 800. 

 Protococcus iiiridis, 892. 

 Protogynous flowers, 792. 

 Protonema, 30, 67, 479, 527, 



735, 739- 



— 29, 68, 479. 



Protoplasm, 73, 78, 289, 290, 

 309, 316, 319, 323, 332, 

 355, 402, 413, 419, 422, 

 613, 614, 615, 638, 639, 

 645, 652, 654, 767. 



— action of water on, 617. 



— composition of, 79, 206. 



— destruction of, 328. 



— dormant, 402, 



— during division, loi. 



— and fermentation, 349. 



— irritability of, 587, 599, 

 603, 655. 



to external agents, 



616, 617, 620, 621. 



— movements of, 81, 194, 

 395, 6°3, 606-608, 615- 



617, 621. 



— regeneration from, 721. 



— as a regulator of diffusion, 

 212. 



of osmosis, 275. 



— respiration in, 401. 



— structure of, 84. 

 Protoplasmic utricle, 80, 



213, 251, 275, 563, 566, 



568, 653, 654. 

 Prunus, 184. 

 ^~ avium, 281. 



— cerasifera, 439. 



— lauro-cerasus, 184, 281. 



— padus, 507, 508. 

 Prussic acid, 342. 

 Pseudo-chlorophyll corpus- 

 cles, 317, 



— -endogenous buds, 475; 

 479. 



INDEX. 



Pseudo-fruits, 464. 

 Piihtum, 55, 62, 70, 510. 

 Pioralea hirta, 185. 



— -7 18s. 



Pteris aquitina, 60, 129, 462, 



471,699- 

 60, 87, 89, 129, 134, 



138, 144, 146. 



— aurata, 186. 



— ere tic a, 801. 

 —flabellata, 119. 



— haitata, 45Q. 



— serrulata, 772-774. 

 771. 



Pulque, 270. 

 Purple leaves, 321. 

 Purpose, 10. 



— of respiration, 403. 

 Putrefaction, 348, 382, 385, 



386. 

 Putrefactive fungi, 382, 386. 

 Pyrola, 302. 



Quamoclit luteola, 672. 

 Quantitative experiments on 

 respiration, 399. 



— selection by roots, 287. 

 Quantity of carbon dioxide 



respired, 399. 



— of embryonic tissue, 419. 



— of starch assimilated, 313, 

 314. 



— of water in plants, 564, 



567, 573- 

 Quince, 90. 



R. 



Radial cell-walls, 442, 452, 



457. 



— and dorsiventral shoots 

 contrasted, 494, 705. 



— growth, 438. 



— organs, 486, 487, 489, 



490, 493, 494, 496, 500, 

 502, 546, 698, 704. 

 rolled up, 706-709. 



— section of wood, 159. 

 Radiation of heat, 404, 643. 

 Radical leaves, 421. 

 Radicle, 12, 332, 414, 689, 



753, 764- 

 Radii, 482. 

 Radish, 24, 169. 

 Rafflesia, 28, 63, 370. 

 Rafflesiacese, 368, 370, 476, 



765- 

 Rain-water, nitric acid in, 



263. 

 Ranunculaceae, 177, 780. 

 Ranunculus, 660. 



— acer, 483. 



827 



Ranunculus Fie aria, 24. 

 Rape, 546. 

 Raphides, 177. 

 Raphidophora, 25. 

 Rapidity of growth in length, 

 569,571- 



— of protoplasmic move- 

 ments, 606, 607. 



— of starch-formation, 311. 

 Rarefaction of air in wood, 



267, 269. 

 Rattan, 657. 

 Ravenala, 50. 

 Reactions of aleurone grains, 



334- 



— ofasparagin, 346. 



— of chlorophyll, 321. 



— to environment, 204. 



— of starch, 337, 340. 

 Receptacles for secretions, 



171, 175, 329- 



Receptive spot, 774-776. 



Reciprocal hybrids, 781. 



Rectangular intersection of 

 cell- walls, law of, 433, 

 434, 442, 456, 502, 743. 



Red autumn-leaves, 319. 



— bacteria, 387. 



— Beech, 159, 493, 506. 



— Bindweed, 533, 672. 



— Clover, 576. 



— colouring matters, 320, 

 328. 



— fruits, 320. 



— light, 303, 638, 696, 697. 



— Pine, 505. 



— wood, 163. 



Reduced antheridia, 749, 

 756. 



— forms, 6, 23. 



— prothallia, 756, 760, 800. 



— roots, 23. 



— shoote, 54. 

 Reeds, 722. 

 Regeneration, 508, 721, 723. 



— from cut organs, 520, 521, 

 582,721. 



Regulation of transpiration, 

 247. 



Relation of nucleus to cell- 

 division, 107. 



— of roots to leaf-surface, 

 156. 



to soil, 256. 



Relations between plants 

 and animals, 202, 413. 



growth and arrange- 

 ment of cells, 436. 



and cell - division, 



431,435,447,449, 453- 

 — • and configuration, 



450- 

 Relations of position, 481, 

 528, 681. 



