766 



BOTANY 



Tulip tree. Liriodeyidwn 

 Turuip, Brassica napus 

 Tussilago, *682, 684 

 Twining plants, 30, 312, *313 

 Tyloses, *16l 

 Typhaceae, 695 



Ulex, 625 



Ullmannia, 542 



Ulmaceae, 554 



Ulvius, *i\, *511, 555, *555 ; apex, *31 ; 

 ovule, *511 



Ulothrix. *92, 360, *361 



Ulotiichales, 360 



Ulva, *12, 360 



Umbel, 490, *492 



Unibelliferae, 633 



Unibellirtorae, 632 



Uncinula, *391, 391, 392 



Uragoga, 664, 667 



Uiedineae, "670 



Uredospores, 407 



Urginea, 703, *704, 707 



Urtica, *116, *287, 558 ; stinging hair, 

 *116 ; hybridisation, *287 ; pollina- 

 tion, 495 



Urticaceae, 558 



Uvticinae, 554 



Usnea, *419 



Ustilagineae, 402 



Ustilaginaoeae, 403 



Ustilago, *403, 403 



Utricularia, 44, *44, 228, 662 



Vaccineae, 641 



Vaccinium, *640, 641 



Vacuole, 53, *54 ; contractile, 56 



Valerian, Valeriana 



Valeriana, 669, *672 



Valerianaceae, 668 



Valeriandla, 669 



Vallisneria, 687 ; pollination, 495 



Vanilla, *713,-7l4 



Vanillin, 240 



Variation, 290 ; external causes of, 170 ; 



Huctuating, 3, 169 

 Vascular, bundles, 120, *121 ; cauline, 



137 ; closed, 124 ; common, 137 ; 



course of, 134 ; foliar, 137 ; system, 



120 ; terminations of, 126 

 Vascular cryptogams, see Pteridophyta 

 Vascular plants, 331 

 Vaucheria, 364, *365 

 Vegetable Sheep, Haastia 

 Vegetative cone, 19, *104 ; reproduction, 



276 

 Velamen, 49, 120 

 Velum, 413 

 Venation, 34 

 Ventral suture, 485 

 Veiatrine, 240 



Veratrum, 703, 707 



Verbascum, 659, *662 



Verbena, *652, 654 



Verbeuaceae, 654 



Vernation, 38 



Veronica, 660 ; cupressoides, *199 



Verrucaria, 418 



Verticillatae, 545 



Vesicaria, 593 



Vessel, *73, 99 ; scalarifovni, 99 



Vetch, Vicia 



Vibrio, *335, 338 



Viburnwn, 668 



Vicia, *230, *622, 627 ; root tubercles, 



*230 

 Vicieae, 627 

 Victoria, 573 



Vinca, 646, *650 ; fibre, *72 

 Vincetoxicum, 649, *650 

 Viola, *488, 499, 593, *594, *595 ; 



colleter, *118 ; epidermis, *115 

 Violaceae, 593 

 Violet, Viola 

 Viscaria, *568 



Viscnm, *97, 156, 230, 558, *559 

 Vitaceae, 609 

 Vitis, *608, 609 

 Vivipary, 525 

 Volf.zia, 542 

 Volva, 413 

 Volvocales, 356 

 Volvox, *357, 358 



Walchia, 542 



Wallflower, Cheiranthus 



Walnut, Juglans regia 



Water, 263 ; alisorptiou of, 182, 191 ; 

 assimilation of, 233 ; conduction of, 

 202 ; culture, 205, *206 ; as food- 

 material, 190 ; influence on growth, 

 263 ; movement of, in the plant, 193 ; 

 plants, 266; stomata, 115; supplj', 

 special contrivances for regulating, 

 196 



Water-ferns, see Hydropterideae 



Water Hemlock, Cicuta 



Water Nut, Trajm 



Water Parsnip, Siimi 



Water-pores, *115 



Wax, deposits of. 111 



Weigelia, 668 



Welwitschia, 540 ; sexual generation, 509 



Wheat, Triticum 



White Mustard, Sinapis alba 



White Water Lily, Nymphaea alba 



Wild Cherry, Primus ccrasus 



Willoughheia, 646 



Willow, Salix 



Willow-herb, Epilobium 



Wind-dispersal of seeds. 521 ; -follinatiou, 

 494 



