xviii CONTENTS 



CHAPTER PAG" 



D Tulip combinations . . . ...... 271 



a. Single . 271 



b. Double 272 



c. Cottage . ....-. 272 



d. Darwin 272 



E Best varieties for forcing 273 



a. Forcing in soil 273 



b. Forcing in water 274 



XXXVII. Fragrant Plants 275 



A Fragrant flowers 275 



a. Shrubs 275 



b. Trees 276 



c. Perennials 276 



B Fragrant leaves 277 



a. Trees and shrubs 277 



b. Perennials 277 



XXXVIII. Poisonous Plants 278 



A Internally poisonous 279 



B Skin irritants 280 



C Causing hay fever "^ ~ 280 



XXXIX. Ornamental Plants Subject to Disease and Insect Pests . 282 



XL. Plants Difficult to Transplant and Those Adapted for 



Transplanting at Specific Seasons of the Year . . . 286 



A Plants which should be transplanted in autumn . 289 



B Plants which should be transplanted in spring . 289 



C Plants which are transplanted with little success . 290 



a. Plants to be rarely if ever transplanted . . . 290 



b. Plants which recover slowly from the operation 



of transplanting 290 



XLI. Shrubs for Forcing in Water in Early Spring .... 292 



XLII. Pruning Lists 294 



A Shrubs needing complete pruning 296 



a. Spring and early summer flowering . . . . 296 



b. Late summer and fall flowering . ... . 297 

 B Shrubs needing removal of old wood only. . . 297 



a. Summer pruning . . . . ". . . . . 297 



b. Winter pruning 297 



C Trees which require little or no pruning . . . 298 



D Evergreens that should be pruned in May orjune 298 



E Evergreens that may be pruned at any time. . 298 



