46 THE BOOK OF SHRUBS 
While very effective grown as single specimens on the 
lawn, P. floribunda and P. malus and their varieties 
appear to the greatest advantage when arranged in small 
groups in the shrubbery. P. éaccata and P. spectabilis 
are equally adapted for lawn specimens and the shrub- 
bery. They will thrive in all descriptions of soil, and 
can be readily propagated by means of budding and 
grafting. 
Rosinias.—T hese constitute an ornamental and useful 
group of trees, but only two of the species have much 
value for the beauty of their flowers. These are the 
Rose Acacia (R. hispida) and the Mexican Locust 
(R. neo-Mexicana), both of which have racemes of 
rose-coloured flowers, but are quite distinct. They 
have elegant leafage, and attain a height of eight or 
more feet. They present an attractive appearance, 
whether grown singly or in groups, but in small 
gardens single specimens will be preferable. Plants 
from layers should be selected because of the risk of 
grafted plants having their heads blown out open by 
rough winds. 
