HARDY SHRUBS IN GREENHOUSE 259 



those of a Rhododendron, so that well-budded plants 

 can be lifted in the autumn and potted without 

 risk. They must be brought on gradually in a cool 

 house, and never suffer from want of water. The 

 earliest to bloom is K. glauca, followed by K. 

 augustifolia, while later on there is the largest and 

 best-known species, K. latifolia, the Mountain Laurel 

 of the United States, which has pretty pink flower 

 clusters. 



Kerria japonica (the Jews' Mallow). — The single 

 Kerria is a twiggy bush, with bright yellow flowers, 

 like those of a single Rose, and expand quickly in 

 spring. The ordinary double Kerria is very bright 

 amongst forced shrubs ; they can be potted in autumn 

 or grown permanently in pots. After the flowering 

 season is over the double variety can be spurred 

 back hard to prevent a tall weakly growth. 



Laburnum. — This has long been used for the 

 greenhouse, and very effective it is when well 

 flowered. It is as a rule most successful when in 

 large pots, in the shape of a standard. Prune 

 back moderately after flowering. 



LONICERA (Honeysuckle). — As L. fragrantissima 

 flowers naturally out of doors soon after Christmas 

 when the weather is mild, it is evident that no 

 forcing is needed to obtain it at that season, and in 

 a cool greenhouse the little white flowers are remark- 

 able for their delicious perfume. As spring advances 

 the early Dutch may be flowered under glass, while 

 the scarlet Honeysuckle (Z. sempervirens minor) is a 

 delightful greenhouse plant, not used so much as it 



