FLOWERING TREES AND SHRUBS 139 



the leaves suffused with greenish-lemon. There is also a 

 creeping form named P. ChamaBcerasus pendula. 



P. DAVIDIANA (syn Persica). Abbe David's Almond. 

 China. This is the tree to which, under the name of 

 Amygdalus Davidiana alba, a First-class Certificate was 

 awarded in 1892 by the Royal Horticultural Society. The 

 typical species is a native of China, from whence it was 

 introduced several years ago, but it is still far from 

 common. It is the earliest of the Almonds to unfold its 

 white flowers, for in mild winters some of them expand 

 before the end of January; but March, about the first 

 week, it is at its best. It is of more slender growth than 

 the common Almond, and the flowers, which are indi- 

 vidually smaller, are borne in great profusion along the 

 shoots of the preceding year, so that a specimen, when in 

 full flower, is quite one mass of bloom. There is a rosy- 

 tinted form known as Amygdalus Davidiana rubra. 



P. DIVARICATA, from the Caucasus (1822), is useful on 

 account of the pure-white flowers being produced early in 

 the year, and before the leaves. It has a graceful, easy 

 habit of growth, and inclined to spread, and makes a neat 

 lawn or park specimen. 



P. DOMESTICA, Common Garden Plum, and P. domestica 

 insititia, Bullace Plum, are both very ornamental flowering 

 species, and some of the varieties are even more desirable 

 than the parent plants. 



P. ILICIFOLIA (syn Cerasus ilicifolius). Holly -leaved 

 Cherry. California. A distinct evergreen species, with 

 thick leathery leaves, and erect racemes of small white 

 flowers. A native of dry hilly ground along the coast 

 from San Francisco to San Diego. Hardy in most 

 situations, but requiring light warm soil and a dry 

 situation. 



P. JACKUEMONTII. Himalayas, 1866. This is a rare, 

 hardy shrub, about 10 feet high, with nearly obovate 

 leaves, and pinky flowers produced in May. 



