xviii CONTENTS 



CHAPTBK F*C« 



D — ^Tullp 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 



