8^8 



Taccaceae, 555. 

 Tamariscineae, 582. 

 Tap-root, 561. 

 Targioneae, 306. 

 Taxineae, 460. 

 Taxodineae, 460. 

 Taxodium, 446. 

 Taxus, 447, 450, 455. 

 Teeth, 331, 334. 

 Teleutospore, 248. 

 Temperature, Action of, 591, 



651, 748, 784, 789. 

 Temperature, Dependence 



of vegetation on, 647. 

 Temperature, Limits of, 651. 

 Tendril, 194, 196, 766, 775. 

 Tension of tissues, 708, 713. 

 Terebinthaceae, 116, 582. 

 Terebinthineae, 582. 

 Terminal branching, 155. 

 Ternstromiaceae, 582. 

 Testa, 42ij 427, 512. 

 Tetracyclae, 580. 

 Tetragonieas, 585. 

 Tetraphis, 319. 

 Tetraspore, 234. 

 Thalloid Hepaticae, 296. 

 Thallome, 130, 137. 

 Thaliophytes, 130, 207. 

 Thallus, 130. 

 Theca, 294, 324. 

 Theory of descent, 842. 

 Thickening-ring, 107, 109, 



575. 

 Thread-indicator, 747. 

 Thuja, 449. 

 Thujopsidae, 460. 

 Thunbergia, 34. 

 Thymelaeaceae, 584. 

 Thymelaeineae, 584. 

 Tiliaceae, 569, 583. 

 Tissues, Forms and Systems 



ofj 77, 431- 



Tissues, Morphology of, 68. 



Torsion, 770. 



Torus, 426, 489. 



Trabeculae, 413. 



TracheYdes, 73, 98. 



Traction, Action of, on 

 growth, 729. 



Trama, 250. 



Transfusion-tissue, 466. 



Transpiration, 602. 



Transport of assimilated sub- 

 stances, 634. 



Trapa, 517, 557. 



Traube's artificial cells, 594. 



Tree-ferns, 355. 



Tremellini, 249. 



Trichia, 275. 



INDEX. 



Trichogyne, 212, 235. 

 Trichomanes, 341. 

 Trichome, 129, 138, 356. 

 Trichophore, 213, 236. 

 Tricoccae, 583. 

 Triglochin, 549. 

 Tropaeolaceae, 582. 

 Tropaeolum, 14, 776. 

 Tube connecteur, 237. 

 Tuber, 196, 255. 

 Tuberaceae, 255. 

 Tubiflorse, 580. 

 Tulipa, 637. 

 Tiillen, 27. 

 Turgidity, 700, 708. 

 Turneraceae, 582. 

 Twining of climbing plants, 



772. 

 Twining of tendrils, 775. 

 Twining stems, 197, 772. 

 Type, 842. 

 Typha, 473, 495. 

 Typhaceae, 504, 555. 



Udotea, 226. 



Ulmacese, 578. 



Ulvaceae, 231. 



Umbel, 520. 



Umbel, Gymose, 158. 



Umbelliferae, 584. 



Umbelliflorae, 584. 



Unequal growth, 765. 



Unguis, 471. 



Unicellular plants, 77, 209, 



615. 

 Unilateral cicinal cyme, 522. 

 Unilateral helicoid cyme, 521. 

 Uredineae, 246. 

 Uredo, 248. 

 Urn, 294, 324. 

 Urticaceae, iii, 578. 

 Urticeae, 578. 

 Urticineae, 578. 

 Usnea, 264, 266, 272. 



Vacciniaceae, 581. 

 Vacuoli, 38, 41. 

 Vaginula, 309, 324. 

 Valeriana, 566. 

 Valerianaceae, 566, 581. 

 Vallisneria, 664, 689. 

 Vallisnerieae, 554. 

 Variation, 696. 

 Variation of hybrids, 820, 

 Variety, 823. 

 Variety-hybrid, 817. 

 Vasa propria, loi. 

 Vascular bundle-sheath, 355. 

 Vascular Cryptogams, 335. 

 Vascular portion of fibro- 

 vascular bundle, 98. 



Vaucheria, 41, 223, 224, 225. 

 Vegetable ivory, 512. 

 Vegetative cone, 117. 

 Velum, 249, 408. 

 Venation, 103, 192, 547, 564. 

 Verbenaceae, 580. 

 Verticillate flowers, 523. 

 Vesicular vessels, no. 

 Vessels, 98. 

 Vicia, 558. 

 Viola, 499, 511, 814. 

 Violaceae, 582. 

 Virginian creeper, 781, 839. 

 Viscum, 506, 557. 

 Vitis, 562, 780. 

 Volvocineae, 217. 

 Volvox, 219, 



Waking and sleeping of 



plants, 786. 



r^ater, Asce 



root, 608. 

 Water, Currents of, in the 



wood, 603. 

 Water, Exudation of, 600. 

 Water of crystallisation, 32. 

 Water of organisation, 32, 



62. 

 Water, Movements of, 598. 

 • 652. 



Watsonia, 507. 

 Wax, 84. 

 Welwitschia, 461. 

 Wendungszellen, 286, 289, 

 Whorl, 149, 166. 

 Whorl, Spurious, 149. 

 Wood, 98, 574, 717. 



Xanthophyll, 685. 

 Xanthoxylaceae, 583. 

 Xylem, 94, 717. 

 Xylem-portion of fibrovas- 



cular bundle, 98. 

 Xyrideae, 555. 



Yeast-fungi, 254. 

 Yucca, 552. 



Zamia, 437. 



Zea, 42,61, 71, 94, i33> Mi? 



143, 144, 147, 827. 

 Zingiberaceae, 548, 556. 

 Zoosporangium, 13. 

 Zoospore, 13, 211. 

 Zygnema, 46. 

 Zygnemeae, 220. 

 Zygomorphic, 183, 533. 

 Zygophyllaceae, 583. 

 Zygospore, 10, 212, 220, 245, 



802. 



