PRUNING FLOWERING TREES 29 



NEILLIA. Thin out every year after flowering is 

 past, cutting back the old wood to strong young 

 shoots. 



NEVIUSIA. This requires the same pruning as 

 Neillia. 



NOTOSPARTIUM. Requires no pruning. 



NUTTALLIA. The single species of this flowers in 

 February, and is improved by a good thinning out of 

 the old wood when blooming is past. 



OLEARIA. Requires no pruning. 



ONONIS. O. rotundifolius should be cut down every 

 winter, as it flowers on the young wood. The re- 

 maining species flower on the older wood, and need 

 not be touched. 



OSMANTHUS. These should not be pruned unless 

 a particular shape is desired, when the plants may be 

 clipped with a pair of shears in spring. 



OXYCOCCUS. This is a small creeping genus allied 

 to Vaccinium, and requires no pruning. 



OXYDENDRON. Remove seed-pods. 



PALIURUS. This attains the dimensions of a small 

 tree, and should be kept trimmed up for that purpose. 



PARROTIA. Thin out in spring after the flowers 

 are past. 



PAULOWNIA. Keep to a single stem to a height of 

 about 8 feet, and then allow it to branch. If used 

 for sub-tropical bedding, it should be cut down to the 

 ground every winter. 



PERAPHYLLUM. The solitary hardy species of this 

 should not be pruned or disturbed in any way if it 

 can be avoided. 



