ON TREES AND SHRUBS. 



40I 



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 atropurpurea (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. Cerasus semperflorens (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 flore-pleno, 

 is more beautiful, and 

 deserving of wider culti- 

 vation. P. C. Avium 

 ■flore-pleno (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 flore- 

 pleno {P. sinensis fl.-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. chamcecerasus (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 



Fig. 259. — Prunus pennsylvanica. 



