INDEX. 



clxix 



Thielavia basicola, 411, 419 



Thoday, D. ( " Botany, a Text-book for 



Senior Students," 132 

 Thomson, J. A., ' Heredity,' 377 

 Thrips tabaci, 405 

 Thunia Bensoniae Winniana, cxx 



X ' Gatton,' A.M., cxx 



X Majoriana, cxx 

 Tilia seeds, germination, 389 

 " Timbers and their Uses," by W. 



Winn, reviewed, 373 

 Tithonia speciosa, in 

 Tobacco beetle, 153 



leaf spot, 419 



root- rot, 411, 419 

 Toeniothrips inconsequens, 419 

 Tomato 'Ailsa Craig Improved,' xcviii 



diseases, 420 



growing for canning, 153 



' Orange Sunrise,' xcviii 



pollination, 420 



products, 420 



spotted wilt, 420 



stripe, 420 



virescent, xcii 



with buds on leaves, xciii 

 Tortrix viridana, 206 

 Transpiration, relative in conifers and 



broad-leaved trees, 421 

 Tree-ferns, 255 



Trichoderma sp. on conifers, 396 



Trichogrammoidea lutea, 396 



Trichopoda pennipes, 399 



Trifolium repens, red form, xciii 

 uniflorum, A.M., civ 



Tritonia refracta, 30 



Truffle-growing, 421 



Trumpet wood, see Cecropia sp. 



Tsuga heterophylla, 399 



Tulip ' John Ruskin,' A.M., cvi 

 * Mrs. Kerrell,' A.M., cvi 

 ' Sophrosyne,' A.M., cvi 

 ' Velvet King,' A.M., cvi 



Tylenchus devastatrix, 236 



Udale, J., on fruit-grading, 71 

 Udo, see Aralia cordata, A. edulis 

 Ulmus integrifolia, in 



minor, xci 



stricta, xci 



Wheatleyi, xci 



variegated, xcii 

 Uromyces caryophyllinus, 234 



Vanilla, influence of pollination, 421 



Varennes, cemetery at, j 



Vapourer moth, 69 



Variegation, loss of, 204, 205 



Vegetable evaporation, 153 



" Vegetable Forcing," by R. L. Watts, 



reviewed, 376 

 "Vegetable Gardening," by J. S. 



Chisholm, reviewed, 131 

 " Vegetable Growing," by J. G. Boyle, 



reviewed, 380 

 Verbena venosa, 422 

 Veronica, 248, 249 



Verticillium albo-atrum, 154 



Viburnum betulifolium, 404 



calvum var. puberulum, 393 

 cylindricum var. crassifolium, 

 393 



rhytidophyllum, 404 

 Viola gracilis ' Elliott's White,' cvi 

 Vitio riparia, 422 



vinifera, 422 

 Voelcker, Dr. J. A., report of chemist 



for 1919, 293 

 Vuylstekeara X bella, cxxi 

 X ' Thera,' cxx 



War Relief Fund, cxlv 

 Watts, R. L., *' Vegetable Forcing," 

 376 



Weather at Wisley, 1918, 90 

 Webster, A. D., " Firewoods : their 

 Production and Fuel Values," 135 

 on systematic afforestation of 

 Great Britain, 278 

 Weeds, 153 



their danger, 141 

 Weston, J. G., on some Irish gardens, 

 247 



White, E., on Economic Botany, 81 



Whiting, A. L., " Soil Biology : 

 Laboratory Manual," 135 



Whitlow peppermint, 153 



Whitton, J., on the public parks of 

 Glasgow, 39 



Willis, J. C, " A Dictionary of Flower- 

 ing Plants and Ferns," 134 



Willow gall, xci, xcii 



Wilt disease, 154 



Winn, W., " Timbers and their Uses," 

 373 



Winter moth, 69, 422 

 Wireworms, 236, 422 

 Wisley, contributions from the Wisley 

 Laboratory, xxxv 



effect of grass on trees, 116 



plants presented, cxli 



trials at, 120 



weather in 191 8, 90 

 Wrightia tinctoria, 100, 111 



Xanthium wilt, 154 

 Xyleborus dispar, 413 



Yield, measurement of, 1 54 



Yucca, 249 



baccata for fodder, 397 

 elata for fodder, 397 

 macrocarpa for fodder, 397 



Zanthoxylum planispinum, 154 

 Zauschneria californica, Wolley Dod's 



var., cxii 

 Zea Mays everta, 408 

 Zizyphus nummularia, 100, 105, in 

 Zygopetalum Roeblingianum, cxxi 



xanthium, cxxi 

 Zygorhynchus on potatos, 410 



