CHAPTER XVII 



HARDY PLANTS AND THEIR ADAPTATION 

 FOR FORCING 



THE constantly increasing demand for flowers has led 

 in recent years, not only to the introduction of new varie- 

 ties, but to the growing under glass of species never before 

 attempted. Among the species now grown are many hardy 

 plants. They are, for the most part, easily forced, cheaply 

 grown and have a large blooming capacity. 



FORCING SHRUBS 



645. Species of shrubs which may be forced into bloom 

 under glass. The species of shrubs best suited for 

 forcing have a compact habit of growth, and are mostly 

 spring or early summer flowering. Among them are the 

 following : 



Azalea nudiflora . . . . . . ..... Swamp Pink 



Azalea calendulacea . . . . . . . . . Flame Azalea 



Azalea indica ..."....*..... Indian Azalea 



Calluna vulgaris . . . . . . . . . . . Scotch Heather 



Cercis canadensis . . . . . . .. Red Bud; Judas Tree 



Chaenomeles (Cydonia) japonica . . . . Japanese Quince 



Cornus florida . . . Flowering Dogwood 



Daphne Cneorum . ... . ; ... . .. Garland Flower 



Daphne Mezereum . . Daphne 



Deutzia gracilis . . . . . . .,.- . . Slender Deutzia 

 Deutzia Lemoinei . . . . . . . Lemoine's Deutzia 



Diervilla florida . . . . . Weigelia 



Exochorda grandiflora . . . . . ... . . . Pearl Bush 



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