ON TREES AND SHRUBS. 



401 



P. divaricata is a useful lawn and park tree, having a round 

 head and pendulous branches ; it is particularly attractive 

 in spring, when mantled with its small snow-white blossoms. 

 Though not so showy in flower as some of its congeners, 

 P. cerasifera atroptirpiirea {P. Pissardi), from Persia, is welcome 

 for its rich purple foliage, and when associated with such 

 things as silver-leaved Acers its beauty is much enhanced. 

 P. Cerasiis semperfiorens (All Saints' Cherry) is a beautiful tree 

 for the lawn. It is of weeping habit, and bears white flowers 

 and red fruits simultaneously during the summer and autumn„ 

 P. Cerasus (^Cerasus vul- 

 garis) is a charming and 

 fairly well-known kind, but 

 its double-flowered form, 

 P. C. Rhexi florepleno^ 

 is more beautiful, and 

 deserving of wider culti- 

 vation. P. C. Avium 

 dorepleno {P. Avium 

 multiplex) is a very attrac- 

 tive ornamental Cherry, 

 its double white pendent 

 flowers being borne in 

 clusters, and lasting in 

 good condition for several 

 weeks ; it is of good 

 growth. P. japonica fiore- 

 pleno {P. sinensis fi.pl.) 

 (Fig. 258) is of slender 

 habit, and bears an abun- 

 dance of small pure white 

 flowers ; this kind is in 

 great demand for forcing. 

 P. cha7ncecerasus (Siberian 

 Cherry) is a delightful 

 small-growing tree with 

 white blossoms, borne 

 profusely in May. P. 

 Jacquemontii, a rare and 

 beautiful free-flowering shrub, should be grown extensively where 

 spring flowers are valued. It forms a neat bush and bears rose- 

 pink flowers. P. prostrata bears a wonderful profusion of rose- 

 coloured flowers, and should be noted by anyone on the 

 look-out for choice shrubs. It is a beautiful border shrub, 

 dwarf, with long, slender growths, and quite hardy. P. Padus 

 (Bird Cherry), a charming European tree, useful for park 

 decoration, grows 35ft. high, and bears numerous racemes of 

 white flowers. Another kind that is useful for forcing is 



2 D 



Fig. 259. — Prunus pennsylvanica. 



