INDEX. 



829 



Root, heliotropism of, 693, 

 694. 



— length of, 13, 512, 513- 



— movement of, 21. 



— primary, 23, 747, 752, 



753,764. 



— sensitiveness of, 16. 



— shortening of, 19, 576. 



— structure of, 15. 



— tap, 23. 



— xylem and phloem of, 168. 

 Rootsofalgae,29,3i, 33, 255. 



— of aquatics, 14, 23, 255. 



— of aroids, 24. 



— of coniferae, 23. 



— of ferns, 31. 



— of fungi, 33, 



— of hepaticeae, 31. 



— of land-plants, 246, 255. 



— of lichens, 34, 35, 394. 

 - — of mosses, 29. 



— of parasites, 23, 25, 369. 



— aerial, 13, 14, 522, 523, 

 660, 693, 704, 71 1. 



— aeration of, 256. 



— development of, 523, 744. 



— effect of temperature on, 

 264. 



— hydrotropism of,7i5-7i7. 



— irritability to contact, 

 715, 716. 



— lateral, 17, 284, 416, 476, 

 677, 699, 704, 705. 



— geotropism of, 707, 708. 



— metamorphosed, 23. 



— relation to leaf-surface, 

 156, 255. 



to leaves, 512, 513. 



- — relations to soil, 256. 



— regeneration from, 721, 

 723. 



— rudimentary, 23. 



— selective power of, 287, 



— space occupied by, 13, 

 512. 



— tissue-tensions in, 575. 



— typical, II. 



— vascular bundles of, 126- 



135- 

 Root-cap, 14, 416, 447,451, 



456, 545, 583- 

 fibres, 13, 14, 15, 418, 



422. 

 forming substance, 519, 



521, 522. 



— -fungi, 388. 



hairs, 17-20, 25, 123, 



256, 374, 512, 514, 524- 

 526, 582, 695,710. 



absorption by, 257, 



262, 274. 



action of, 263. 



attachment to soil, 



257, 259. 



Root-hairs, excretion of 

 acids by, 262. 



— — functions of, 255, 275. 



• solution by, 262. 



Rootless plants, 62. 

 Root-like shoots, 62. 



parasites, 232, 253, 534. 



pole, 484. 



pressure, 271, 274, 275, 



281. 



274. 



conditions affecting, 



273,278. 

 daily periodicity of, 



273. 

 fluctuations of, 272, 



599. 



in fungi, 281. 



measurement of, 274, 



277. 

 stock, 276, 300, 312, 330, 



343, 366. 

 negative pressure in, 



277. 

 weeping of, 270. 



— tubers, 21, 23, 24, 517. 

 Rosacese, 463, 780. 

 Rose, 463, 507, 537, 756. 



— of Jericho, 588. 

 Rostelluin, 796. 

 Rotation, 82, 616-617. 

 Royal fern, 744. 

 Rubidium, 383. 

 Rudimentary tissue, 141, 



149. 



— organs, 6. 



— vascular bundles, 151. 



— shoots, 65. 



— roots, 29. 



— reproductive organs, 723. 

 Ruellia clandest'ma, 791. 

 Rumex, 124. 



Runners, 58, 478, 504, 703, 



708, 721, 798. 

 Ruscus, 55, 511. 



— aculeatus, 55. 



— hypoglossum, 49. 

 Rushes, 145, 219. 

 Russelia juncea, 55. 

 Rust-fungi, 381. 

 Rutaces, 183. 

 Rye, 337, 687,790- 



S. 

 Sabal, 702. 



Saccharomycetes, 385. 

 Saccharum ofpchiarum, 117. 

 Sag'ittaria, 43. 

 Sa^lep, 180. 

 Salices, 780. 

 Salix, 177, 184, 784. 

 —fragilis, 236. 



— gramlifoUa, 5 1 . 

 50, 128. 



Salicylic acid, 385. 

 Saltpetre, 291, 325, 567. 

 Salts, 79, 172, 202, 226,253, 



260, 262, 283, 296, 324, 



566. 



— absorption by roots, 262, 

 287. 



— absorption and retention 

 by soil, 260, 261. 



— ammonia, 292, 384. 



— as affecting transpiration, 

 252. 



— essential in nutrition, 284, 

 287. 



— in sap, 274, 280. 



— in soil, 259, 262, 287. 

 Salvia, 186. 



— 794. 



— pollination of, 794. 



— hirta, 791, 



— pratensis, 794. 

 Sal-vinia, 62, 442, 756. 

 Salviniaceae, 40. 



— reproduction of, 745. 

 Sambuciis, 186, 319. 



— Ebulus, 129. 



— 7iisra, 177, 179, 570. 

 Sand, 259. 

 Sandarach, 181. 

 Santalum, 760. 



Sap, 274. 



— salts in, 274. 

 Saprolegnis, 375, 381, 612, 



777- 

 Saprophytes, 63, 366, 367, 



369, 371. 

 Saprophytic fungi, 381. 



— Phanerogams, 371, 511. 

 Sarcina, 387. 

 Sargassum, 69. 



— inilgaruin, 71. 

 Sauromatum, 699. 

 Saxifrage, 280. 

 Scalariform vessels, 137. 

 Scale-bark, 166. 

 Scale-leaves, 504, 506, 507. 



— converted into foliage- 

 leaves in the light, 536. 



Scammony, 180. 

 Scape, 418, 543, 546. 

 Scarlet Runner, 505. 



629, 630, 688. 



Schizogenous glands, 185, 



186. 

 Schizomycetes, 384, 385, 



386. 



— 387. 

 Scirpus, 219. 



— cladium, 145. 



— nwritimus, 708. 

 Scitaminese, 802. 

 Sclerenchyma, 144, 181, 219, 



230, 423, 511, 569, 570, 

 572. 



