6i8 



INDEX. 



Truffles, propagation of, 316. 

 Tubers, grafting of, 86. 

 Tulipa, 373- 

 Tulip-tree, 390. 

 Tulips, 373. 



ULMACE^E, 559. 

 UmbelliferjE, 557. 

 Utricularias, 361. 



VACCINIACE.E, 559. 



Vaccinium, hybrid of, 560. 



Valotta, seedlings of, 173. 



Van Houtte's hybrid Alstroemerias, 175. 



Vanilla, 420. 



Variability and nutrition, 99 ; induced by 

 culture, 95 ; of the same fruits on differ- 

 ent stock, 63. 



Variation, causation of, 98. 



Variation of plant-form and insects, 126. 



Variegation induced by budding or graft- 

 ing, 60. 



Varieties, enhancing the permanence of, 

 125 ; fixity of, 98. 



Vegetable, seeds of, for an acre, 596 ; when 

 to sow, 595. 



Vegetables, improvement of, 9; selected 

 and improved, 10. 



Vegetative growth, how checked, 1 1. 



Ventilation of propagating houses and 

 pits, 19. 



Verbascum, hybrids of, 529. 



Verbena family, 560; seedlings of, 560; 

 types of, 560. 



Verbenaceae, 560. 



Veronica Andersoni, 154 ; salicifolia-speci- 

 osa, 154 ; hybrids of, &c., 537. 



Viburnum, 230; macrocephalum, stock 

 for, 230. 



Victoria Regia, cross-fertilisation bene- 

 ficial to, 100. 



Vigour, constitutional, 122. 



Vinca, seed-sowing of, 587. 



Vine, the Grape, types of, 564. 



Vine- eyes for propagation, 569 ; in heat, 

 582. 



Vine-pollen, direct influence of, 103. 



Vines, grafting, 82, 570 ; inarching. 582 ; 

 grafting barren with bearing wood, 584 ; 

 stocks for, 569. 



Viola canina, 145; hirta, Monnier on, 145; 

 mirabilis, Linnaeus on, 145 ; odorata, 

 145 ; self-fertilised, 145 ; tricolor, 146. 



Violacese, 562. 



Violet, cleistogamous nature of, 145 ; 

 family, 562. 



Viscum, 383. 



Vitality of seeds, 36. 



Vitis vinifera, specific or hybrid nature of 

 (see W. D. Focke in '^Esterr. Bot. 

 Zeitchr.,' Feb. 1876), 567. 



Vitis, list of American species, 565. 



Viviparous a term applied to Ferns and 

 other plants which produce young 

 plants on their stems or branches, 5. 



Von Mohl on ovules in Oxalis, Viola, and 

 Impatiens, 147 ; on Violas, 145. 



WALLFLOWER family, 209. 



Walnut family, 356. 



Walnuts, seedlings and other stocks for, 



Water-lily family, 403. 

 Wax or mastic for grafting, 68. 

 Weddell on bigeneric hybrids, 135. 

 Wellingtonia, 261, 266. 

 (In Messrs Lee's nursery, Wood Lane, 

 Isleworth, it is found that cuttings 

 taken from some individuals of this 

 species root freely, while those 

 from others refuse to do so. 

 Wellingtonias raised from cuttings 

 are not so liable to mildew as are 

 those raised from seeds. This in- 

 dividuality is very apparent in 

 Slants, as pointed out by Darwin 

 i the case of Pelargonium, and as 

 shown by Mr Pearson in the case 

 of the Moor Park Apricot.) 

 Welwitsch on Loranths, 382. 

 Wheat, fertilisation of, 138, 340, 341. 

 Whip-grafting, 74. 



Wichura on cultural variability, 96 ; on 

 hybridism, 152; on preserving pollen, 

 109. 



Wiegmann on cross-fertilised Peas, 105. 

 Wilder on seedling Camellias, 552; on the 



variation of seedlings, 97. 

 Williams on cross-fertilisation and fer- 

 tility, 101. 

 Willow family, 523 ; hybrids, 523 ; pollen 



and bees, 154. 

 Willows, increase of, 581 ; natural hybrids 



of, 8 ; pollen of, 109, 150. 

 Wind-fertilised plants, 137. 

 Wind-flowers, 507 ; increase of, 590. 

 Wistaria, 435 ; grafting, stocks for, &c , 



436 ; root-grafting, 582. 

 Wood-sorrel family, 424 ; ovules of, 147. 



YEW-TREE, cuttings inserted in autumn 

 in the open borders root well if firmly 

 planted, 261. 



Yucca, 374 ; fertilisation of insect agency, 

 375 ; seeds, germination of, 376. 



ZEA MAYS, pollen influence in, 103. 



Zen on originating new varieties of the 



Rose by budding, 62. 

 Zingiberacese, 578. 



Zinnia Darwini, 257 ; Haageana, 256. 

 Zinnias, hybrid, 256. 



PRINTED BY WILLIAM BLACKWOOD AND SONS. 



