INDEX AND GLOSSARY 



579 



Valonia, non-septate sac of, 139. 



Vascular-strand, of Dicotyledons, 37 

 (Figs. 23, 24), 47 (Fig. 33) ; of 

 Cucumber, 41 (Fig. 25) ; of Mono- 

 cotyledon, 45 (Fig. 32). 



Vascular-system, 33, 34 (Figs. 20, 21), 

 37 ; of Male-Fern, 328 (Fig. 267). 



Vascular-tissue, 38 (Figs. 23, 24). 



Vaucheria, non-septate tubes of, 1 39 ; 

 chlamidospores of, 398, 426 ; life- 

 history of, 395 (Figs. 334-336); 

 comparison with Peronosporeae, 

 420, 422. 



Vegetable food-stuffs, 5 40, Appendix B. 



Vegetative-cell, in pollen-grain, the 

 cell from which the pollen-tube 

 is formed, but does not itself take 

 part in syngamy, 247 (Fig. 194). 



Vegetative-propagation, increase in 

 numbers by detachment of a part 

 of a vegetative plant-body. Chap, 

 xii., p. 211, 300 (Fig. 244) ; rare 

 in Conifers, 305 ; in Ferns, 336, 



477- 



Veins of leaf, 60 (Fig. 45), 64 (Fig. 

 46). 



Vellozia, fission of stamens of, 232 

 (Fig. 181). 



Velum, of Mushroom, 453. 



Venation, parallel and reticulate, 60 

 (Fig. 43)- 



Ventilating-system, of intercellular 

 spaces, 36 ; of sporophyte, 487. 



Ventral-canal-cell, of Pine, 311 (Fig. 

 253) ; of Selaginella, 321 ; of Fern, 

 344 (Fig. 285) ; of Moss, 361 (Fig. 

 304)- 



Venus' fly-trap, carnivorous habit of, 

 208. 



Verbena, spike of, 225 (Fig. 172). 



Verbenales, 493, 532. 



Veronica, meiomeryin, 235 (Fig. 183); 

 ^ flower of, 530 (Fig. 437). 



Vessel, result of fusion of two or 



more cells, by absorption of septa 



and protoplasmic contents, to form 



an open channel, 29 (Fig. 18), 38, 



^ 39 (Fig. 24), 40, 50 (Fig. 37). 



Vestigial remains, parts imperfectly 

 developed which mark the place 

 where normally a fully developed 

 part would be, 235 (Fig. 183). 



Vetch, tendril of, 182. 



Vexillum, the posterior petal of Pea- 

 flowers, 522 (Fig. 431). 



Vibrio, slightly spiral-shape of Bac- 

 teria, 458. 



Vicia Faba (Broad Bean), 6 (Fig. 2) ; 

 root-tubercles of, 205 (Figs. 155, 

 156) ; analysis of, 542 ; origin of, 



543- 



Vine (Vitis Vinifcra), panicle of, 227 

 (Fig. 174) ; origin of, 543. 



Violaceae, transfer of seeds, 294. 



Violet, stylar channel of, 257 ; dis- 

 semination of seeds, 288. 



Virginia creeper (Ampelopsis Vetchii), 

 climbing shoots negatively helio- 

 tropic, 127 ; adhesive chmbing of, 

 184 (Fig. 137). 



Viviparous habit, 477. 



Volvocales, 390, 391 (Fig. 329). 



Walnut, 544. 



Water, proportion of in plants, 84 ; 

 in the soil, 75 (Fig. 57), 85 ; con- 

 duction by woody stem, 57 ; 

 storage in xerophytes, 175. 



Water-culture, recipes for, 93, 94 

 (Fig. 70)- 



Water-economy, 94. 



Water-lily, floating leaves, 178; peri- 

 sperm of, 281. 



Water-relation, Chap. vi. ; its effect 

 on adaptive organisms, 175. 



Water-transport, of seeds and fruits, 

 290. 



W^ax, covering surfaces of xerophytes, 

 176. 



Weeds, unconscious transfer by man, 

 294. 



Welwitschia, deep-rooted, 176; cor- 

 relation in, 184. 



Wheat, as host of Puccinia, 443 

 (Fig. 375) ; infection by Aecidium 

 spores, 444 ; by Uredospores, 445 

 (Fig. 379) ; structure of, 545 (Fig. 

 446) ; analvsis of, 547 ; origin of. 

 548. 



Whole-meal, 547. 



Wild-hyacinth (Scilla), 495. 



Willow (Salix), 505 (Figs. 408-411). 



Willows (Pollarded), flora of. 295. 



Wind, as pollinating agent. 205 ; in 

 dissemination of seeds, 289. 



Winter- Kale (Brassica), analysis of, 

 541 ; origin of, 542. 



\\'inter-spores (Teleutospores) of 

 Puccinia, 443 (Figs.^ 375. 380) ; 

 germination of, 440 (Fig. 381). 



Wood-tibrcs, 50 (Fig. 37), 145. 



Wood-parenchyma, 51 (Fig. 37). 



Wood-rush. 492, 500 (Fig. 403). 



