698 



BOTANY OF THE LIVING PLANT 



Ustilaginales (Smuts), 440. 



Ustilago, classification of, 401 ; ger- 

 mination of, 440 (Fig. 339). 



Utricularia, bladders of, 241 (Fig. 

 167, A). 



Vaccinium, 640. 



Vacuole, a cavity in the cytoplasm, 

 filled with cell sap, 22 (Figs. 12, 13), 

 29 (Fig. 17). 



Valerian, wind-borne fruit of, 325 

 (Fig. 246). 



Valonia, non-septate sac of, 171. 



Variation, 339, 569, 585. 



Vascular plants, success of, 602. 



Vascular strand, of Dicotyledons, 41 

 (Figs. 20, 21), 56 (Fig. 34) ; of 

 Cucumber, 48 (Fig. 25) ; of Mono- 

 cotyledon, 52 (Fig. 31). 



Vascular system, 40 (Figs. 20. 21) ; 

 of Palm-type, 51 (Figs. 29, 30) ; 

 of Male Fern, 484 (Figs. 374, 

 376). 



Vascular tissue, 44 (Figs. 23, 24). 



Vaucheria, non-septate tubes of, 171 ; 

 aplanospores of, 372 ; life-history 

 of, 369 (Figs. 274-276) ; compari- 

 son with Fungi, 402, 410, 411, 412, 



447- 

 Vegetable foodstuffs, 653 (Appendix 



B). 

 Vegetation, three grades of, 602. 

 Vegetative-cell, in pollen-grain, the 



cell from which the pollen-tube 



is formed, but does not itself 



take part in syngamy, 283 (Fig. 



204). 

 Vegetative propagation, increase in 



numbers by detachment of a part 



of a vegetative plant-body, Chap. 



xiii., p. 244 ; rare in Conifers, 529 ; 



in Ferns, 494. 

 Veins of leaf, 71 (Fig. 46). 

 Vellozia, fission of stamens of, 266 



(Fig. 190). 

 Velum, of Mushroom, 444 v., (Fig. 



34L 343)- 

 Venation, parallel and reticulate, 



71-72. 

 Ventilating-system, of intercellular 



spaces of sporophyte, 553 ; absence 



of in large underground prothalli, 



550- 

 Ventral-canal-cell, of Pine, 536-537 



(Fig. 424) ; of Selaginella, 518 (Fig. 



412) ; of Fern, 502 (Fig. 394) ; of 



Moss, 468 (Fig. 363). 

 Venus' Fly-trap (Dionoea) , carnivorous 



habit of, 165 (Fig. 100), 239. 



Verbena, spike of, 259 (Fig. 181). 



Verbenales, 645. 



Vernalisation, 152. 



Veronica, meiomery in, 269 (Fig. 

 193) ; flower of, 644 (Fig. 495). 



Vessel, result of fusion of two or more 

 cells, by absorption of septa and 

 protoplasmic contents, to form an 

 open channel, 25 (Fig. 15), 43, 46 

 (Fig. 24), 59 (Fig. 38) ; laticiferous, 

 54 (Fig. 32). 



Vestigial remains, parts imperfectly 

 developed which marks the place 

 where normally a fully developed 

 part would be, 268 (Fig. 192). 



Vexillum, the posterior petal of Pea- 

 flowers, 636 (Fig. 467). 



Viability of seeds, 140. 



Vibrio, slightly spiral-shape of Bac- 

 teria, 448, 452. 



Vicia, 235 ; root-nodules of (Figs. 

 163, 165). 



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

 growth of root, 144 (Fig. 89) ; 

 analysis of, 655 ; origin of, 656. 



Vine (Vitis vinifera), panicle of, 261 

 (Fig. 183) ; origin of, 656. 



Violaceae, transfer of seeds, 330. 



Virginia Creeper (Ampelopsis Vetchii), 

 climbing shoots negatively photo- 

 tropic, 159 ; adhesive climbing of, 

 197 (Fig. 146). 



Vitamins, 138, 662. 



Viviparous habit, of Alpines, 587. 



Volvocales, 361, 375. 



Volvox globator, 362, 363 (Fig. 268). 



Walnut, analysis of, 657. 



Water, proportion of, in plants, 95 ; 

 in the soil, 96 (Fig. 60) ; of con- 

 stitution, 95 ; of imbibition, 95 ; 

 gravitational, 96 ; significance of, 

 96 ; absorption of, by root-hairs, 

 98 ; lateral movement of, 99 (Fig. 

 68) ; ascent of, 105 ; cohesion by, 

 106 (Fig. 73) ; conduction of 

 woody stem, 68 ; storage in xero- 

 phytes, 209 (Fig. 141). 



Water-bloom, 377. 



Water-culture, recipes for, no (Fig. 



75)- 



Water-lily, floating leaves, 212 ; peri- 

 sperm of, 317. 



Water-Net (Hydrodictyon), 365. 



Water-relation, Chap, vii., p. 95 ; its 

 effect on adaptive organisms, 

 208. 



Water-transport, of seeds and fruits, 

 326. 



