Symphytum, 496. 



— 496. 



Sympodium, 60, 466. 

 Synaliija symphorea, 392. 

 Synergidae," 760, 771, 800. 

 Syringa, 124, 186, 506, 507. 



— -vulgaris, 399. 

 Systems of tissue, 110, 113, 



141. 



Tamuj elephantipes, 668. 

 Tangential growth, 438. 



— phloem, 164. 



— section of wood^ 159. 

 Tannin, 176, 179, 321, 327, 



328, 388, 645, 652. 



vesicles, 179, 181. 



Tap root, 23. 

 Taraxacum, 642. 

 ■—officinale, 21, 174, 335, 



572, 574. 

 Tartaric acid, 328, 384. 

 Tartrate of ammonia, 383, 



386. 

 TaxincEE, shoots of, 35. 

 Taxus, 177, i8r, 321. 



— baccata, 751. 



752. 



Teazel, 572, 576. 



lectona, 163. 



Temperature, as affecting 



the bleeding of wood, 

 266. 



evaporation, 228. 



■ movements of water, 



270. 



protoplasmic move- 

 ments, 606, 608. 



■ root-absorption, 264, 



278. 



root-pressure, 278. 



transpiration, 252. 



weeping of root-stock, 



270. 



— curve of, 305, 406. 



— effect on plant, 191, 194, 



593) 646- 



— of fermentation, 386. 

 ■ — of imbibition, 210. 



— influence on growth, 553, 

 555- 



— periodic oscillations of, 

 406. 



— of plants, 404. 



— of respiration, 397. 



— of soil, 553,554- 



— as a stimulus, 597, 641. 



— effect of variations in, 

 540, 541, 549, 551-553, 

 556, 559, 560, 625, 641, 

 642. 



— of wood, 404. 

 Tendril-plants, 56, 513, 658. 



[3] 



Tendrils, 378,533,547,571, 

 596, 598, 599, 657, 658, 

 659, 660, 667, 670, 673, 

 675, 676, 689, 713, 716. 



— coiling of, 661-665. 



— contraction of, 665. 



— curvature of, 661, 662. 



— diameter of, 666. 



— growth of, 664, 665. 



— heliotropism of, 667. 



— irritability of, 658, 659, 

 661-666. 



— mechanics of, 664. 



— relations to support, 666. 



— revolving nutations of, 

 661, 664, 666, 667. 



— thickening of, 663. 



— turgescence of, 665. 



• — and twining shoots com- 

 pared, 668, 674, 675. 



Tension of air in wood, 

 268. 



Tensions and pressures in 

 cortex and wood, 574, 



575, 577-579, 58°- 



— of tissues, 216, 437, 569- 



574, 583. 

 Terminal buds, 466. 



— flower, 483. 

 Testa, 752. 

 Tetrads, 739. 

 Tetrahedral cells, 434. 

 434. 



— apical-cell, 447, 456, 743. 



— — 456. 

 Tetraphis, 68, 723. 



— petlucida,12Si. 

 Tetrajpora, 433. 



— lubrica, da^j. 

 Thallophytes, 126, 171. 



— epidermis of, 121. 

 Thallus, 8, 390, 393. 

 Theca, 738. 

 Thelephora, 700. 



■ — perdrix, 388. 

 Theory of ascent of water, 

 238, 241. 



— of descent, 316. 



— of fermentation, 349, 



— of geotropism, 691. 



— of growth, 689. 



• — of growth by intussus- 

 ception, 413. 



— of heliotropism,677, 695- 

 696. 



Thermo-electric observa- 

 tions, 406. 



Thermometric observations, 

 404. 



Thesium, 27, 367, 369, 



Thickening of the cell-wall, 

 92. 



— • of roots, 168. 



— of tendrils, 663. 



3H 



Third phase of growth, 414, 



423,425- 

 Thistle, 388, 651. 

 Thladiantha, 522. 



— dubia, 21, 24, 516. 

 Thorn-apple, 37, 130. 

 Thorns, 57, 423, 466, 475. 

 Three phases of growth, 414, 



417, 418, 424. 

 Thuja, 40, 758. 

 Thunbergia, 669. 

 Thyme, 185. 

 Thymus vulgaris, 183. 

 Tilia platyphyllos, 446. 

 Tiliaceae, 180. 

 Tissue, assimilating, 148. 



— .-cells, 433,453- 



— embryonic, 413, 417, 418, 

 419, 422, 423, 431, 440, 

 445, 461, 466, 467, 473, 

 477, 479, 480, 482, 765. 



• — fundamental, 141, 423. 



— lenticel-, 167. 



— permanent, 419, 425, 440, 

 465, 466, 467, 479. 



■ — rudimentary, 141. 



— systems of, 141. 



tensions, 216, 437, 583. 



daily periodicity of, 



575- 



and growth, 569-574. 



in motile organs, 631- 



633, 648, 649. 



in roots, 575, 576. 



transverse, 572, 574, 



580. 

 Tissues, iio, 423, 457, 733. 



— continuity of, 139, 469, 



475. 



— cortex, 138. 



— curvatures of, 217. 



— of cryptogams, 149. 



— elasticity of, 219. 



— extensibility of, 220. 



— flexibility of, 220. 



— functions of, 355. 



— of lichens, 392. 



— pressure in, 362. 



— of phanerogams, 149. 



— rigidity of, 218. 



■ — shortening of, 570-372. 



— transport of materials in, 



355- 



■ — of wood, 138. 



Toadstools, 71, 73, 152. 



Tobacco, II, 51, 225, 227, 

 228, 229, 259, 262, 264, 

 271, 274, 276, 277, 293, 

 310, 312, 315, 513, 331, 

 703, 742. 



— 435. 



Torsions, 548, 549, 669- 



673, 675, 676,714. 

 Tracheae, 137. » 



