INDEX. 



cclxi 



Skunk cabbage, see Lysichitum cam- 



tschatcense 

 Sloe, food for pests, 36, 38, 39 

 Snails, 385 



Snowdrop, see Galanthus 



Sodium, manuring with its salts, 165 



Soil acidity, new test for, 530 



analysis, 165 



atmosphere, 166, 530 



bacteria, 385, 386 



carbonized material in, 167 

 " Soil Conditions and Plant Growth," 



by E. J. Russell, reviewed, 142 

 Soil constituents, organic, 166 



effect of lime, 530, 531 



effect of removing soluble 

 humus, 532 



formation and climate, 531 



moisture, 386, 523 



plant food from, 173, 188 



sampling, 529 



sterilization, 386 



temperature, 166 

 Soils, alkaline, 509 



ammonification in, 150 



bacteria in, 150, 151 



marsh, their reclamation, 384 



mechanical analyses of, 522 

 Solanum aculeatissimum, see ciliatum 



ciliatum, A.M., ccxv 



nigrum, 19 

 Soldanella alpina, 420 



montana, 420 



pusilla, 4«o 

 Solidago multiradiata, 25 

 Solms-Laubachia pulcherrima, 208 

 Sophora japonica, 5, 8 

 Sophrocattleya x Blackii, ccxxii 

 x ' Doris,' cxli 

 x pumeximium, ccxxii 

 x ' Sylvia,' F.C.C., cxli 

 x Wellesleyae, lxvii 

 Sophrolaeliocattleya x ashteadensis, 

 ccxxi 

 x ' Niobe,' lxxi 

 x ' Serbia,' ccxxii 

 Sorbus cuspidata, cxxviii 



host for fruit pests, 39 



sp. in Yunnan, 206 



vestita, cxxviii 

 Soy bean, 167 

 Spenceria ramalana, 205 

 Sphaeropsis Malorum, 510 

 Sphaerotheca Humuli, 522 



Mors-uvae, 378 



pannosa, xlii 

 Sphagnum for apple storage, 128 

 Spicaria Solani, 527 

 Spinach, germination capacity, 165 

 Spindle tree, host for fruit pests, 39 



crown gall on, 161 

 Spiraea arborea, 167 



ariaefolia, 23 



Aruncus, 23 



Douglasii, 23 



Lindleyana, 167 



sp. in Yunnan, 201 

 *' Spirit of the Soil," by G. D. Knox, 

 reviewed, 364 



I Spondylocladium atrovircns, 162, 527 

 Spongospora subterranca, 162, 527 

 Spraying in orchards, 35-37 



machine accessories, 167 

 Spruce, 154, 155 



rust, 532 

 Squash, longevity of seeds, 

 Squaw grass, see Xerophyllum tenax 

 Statices of Canaries, 516 

 Stebbins, C. A., " The Principles of 



Agriculture," 142 

 Stereum purpureum, 385 

 Sterigmatocystis nigra, 387 

 Sternbergias, autumn-flowering, 384 

 j Stevenson, Thos., on cultivation of 



chrysanthemums in pots, 64 

 j Stevia paniculata, ccxv 

 Stilbella flavida, 373 

 Stocks, doubling in, 532 

 " Story of Plant Life in the British 

 Isles," III., by A. R. Horwood, 

 reviewed, 142 

 Strawberries, damaged by ground 

 beetles, 



effect of exploding soil for, 126 

 forcing, 532 

 Strawberry buttoning, 533 



' Madame Henri Leduc,' 532 

 ' Monseigneur Fournier,' 532 

 ' Noble,' 532 

 pests, 532 



preparation of runners, 167 



' St. Fiacre,' A.M., ccii 



thrips, 533 

 Strawberry-clover, 533 

 Streptocarpus achimeniflorus albus, 533 



attacked by dodder, cviii 



denticulatus, 533 



x Taylori, 533 

 Strobilanthus versicolor, 206 

 " Study of Plants : an Introduction 

 to Botany and Plant Ecology," by 

 T. W. Woodhead, reviewed, 353 

 Styrax sp. in Yunnan, 201 

 Sugar-beet, diseases, 533 



leaf-spot disease, 387, 533 



wireworm, 534 

 Sulphur as manure, 167, 534 



in plant nutrition, 387 



in soil, 168 

 Sundries, awards to, in 1915, ccxxvi 

 Sunflowers tried at Wisley, 191 5, xxxii 

 Sunlight, its removal induces changes 

 on colour and structure of flowers, 

 4 2 



Swamp Gum, see Eucalyptus Gunnii 

 Sweet Pea ' Blanche Ferry,' 115, 116 

 ' Captain of the Blues,' 116 

 ' Jean Ireland,' A.M., cxxvii 

 ' Lottie Eckford,' 116 

 ' Mont Blanc,' 115 

 ' Mrs. R. Ward,' lxi 

 ' Telemly,' 116 

 ' Yarrawa Spencer,' lxi 

 ' Zvolanek's Christmas,' 116 

 " Sweet Peas and Antirrhinums,'' 

 by W. Cuthbertson, reviewed, 

 134 



classification, 168 



