1597. This is a dwarf, slender-branched, and gracefully pendent shrub,
of free growth, undoubted hardihood, and well worthy of extended
cultivation. The variety C. Chamaecerasus variegata has the leaves
suffused with greenish lemon. There is also a creeping form named P.
Chamaecerasus pendula.

P. DAVIDIANA.--Abbé 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 individually 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. ILLICIFOLIA (_syn Cerasus ilicifolius_).--Holly-leaved Cherry.
California. A distinct evergreen species, with thick leathery leaves,