390 



Index 



Sophora, 211, 263 



Sorbus, Mountain Ash, 211, 263, 



264, 365- 369- 372 



Sorrel Tree, Oxydcndron, 212, 293 



Sour Gum, Nyssa, 212, 291, 371 



Spacing of trees, 180, 321 



Span-worms, see Inchworms 



Species, number of, 202, 206; descrip- 

 tion of those in Washington, com- 

 piled by B. E. Fernow, 206 



Specimen trees, planting of, 183, 

 198, 208, 216, 218, 355 



Sphinxes, 157 



Spiders, 131 



Spikes (tlower shapes), 325 



Spindletree, Evonymous, 192, 359 



Spiny Elm caterpillar, 163 



Spinners (moths), 158 



Spiraa, 151, 325, 328, 350, 351, 

 366-371 



Spot diseases, 37 



Spraying, 55, 127, 135, 140, 141 



Spraying machinery, 138; discussion 

 of in Yearbook of U. S. Dept. of 

 Agriculture, 140; dealers in, 140 

 note 



Springfield, Mass., cost of spraying 

 in, 141 



Spruce, Picea, 16, 25, 166, 178, 189, 

 193, 203, 209, 215, 228, 373; 

 Blue, 242, 366; Caucasian, 243,* 

 244; Japanese, 244,* Norway, 

 178, 240, 242; Red, 242; White, 

 242, 371 



Spruce-bud tortrix, 166 



Spruce-bud worm, 166 



Spruce forests in Europe, 148 



Spurge Laurel, Daphne, 359 



Squash-bug, 150 



Stagger Bush, Pieris, 328, 338 



Staghead, 53, 61, 62, 72 



Steeplebush, Spircca, 328, 350, 370 



Stomach of the plant, iS 



Stonebreak family, Saxijragacea, 

 352 



Stool shoots, 193 



Storax family, 354 



Strawberry-bush, Calycanthus, 327, 

 357, 368, 370 



Strawberry-bush, Pints, 212, 297, 

 299* 



Strawberry Tree, Evonymus, 359, 

 368 



Street trees, degrees of light intensity 

 needed, 25; aeration, 82; height of 

 crown from ground, loi ; pruning 

 while young, 109; spacing, 116, 

 180; mechanical injuries, 117; 

 guards for, 117; conditions for 

 planting, 173, 176, 364; size, 178, 

 364; adverse conditions, 199; con- 

 siderations in choice, 201; inap- 

 propriate species, 203; also 198, 

 214, 226, and List, pp. 364-365 



Stiiartia, 328, 363, 370 



Slyrax, 328, 355 



Suckers, see \Vater-sprouts 



Suffocation, see Respiration 



Sugar Plum, see Juneberry 



Sulphur, 363 



Sulphur, Flowers of, formula, 146 

 note 



Sumach, Rhus, 211, 261, 368, 370- 

 372; Dwarf, 262; Osbeck, 262; 

 Smooth, 262; Staghorn, 262; 

 Venetian, 262 



Sun-scald, 36, 56, 59, 68, 175, 250, 2S6 



Sunflower, 325 



Surgery, 27, 32 



Swamp Honeysuckle, Azalea, 331 



Swamps, and root respiration, 20 



Swampy soil, trees suitable for, 371 



Sweet Fern, Myrica, 328, 362 



Sweet Gum, Liquidambar, 212, 288, 



36s 

 Sweet Gale, Myrica, 328, 362 

 Sweet Pepperbush, Clethra, 327, 332, 



366, 370, 372 

 Sweetbriar, English, 349 

 Sweetleaf, Syniplocos, 329, 355, 368 

 Swift's arsenate of lead, 135 note 

 Sycamore, Plalanits, 65, 69, 84, 103, 



212,298,299,364,370,371 

 Symplwricarpus, Waxberry, Indian 



Currant, Coral Berry, 329, 339, 



366, 368-370, 372 

 Symplocos, Buch-Ham, Sweetleaf, 



329, 355, 2,(^'^ 

 Syringa, Lilac, 325, 320, 344, 345, 



354, 36S, 370, 371 



Tachina flies, 130 



Tamarack, 166, 230 



Tamarisk, Tamarix, 213, 316, 325, 



371, 372; French, 318 *; German, 



317 *; Indian, 319 * 



