great beauty of blossom and leaf, delicious fragrance, and adaptability
to various soils. The single-flowered form extends over large areas in
the Atlantic States of North America. They are very desirable,
small-growing trees, and are described by Professor Sargent as being not
surpassed in beauty by any of the small trees of North America.

P. BACCATA.--Siberian Crab. Siberia and Dahuria, 1784. This is one of
the most variable species in cultivation, and from which innumerable
forms have been developed, that differ either in habit, foliage,
flowers, or fruit. The deciduous calyx would seem to be the only
reliable distinguishing character. It is a widely-distributed species,
being found in North China and Japan, Siberia and the Himalayas, and has
from time immemorial been cultivated by the Chinese and Japanese, so
that it is not at all surprising that numbers of forms have been
developed.

P. CORONARIA.--Sweet Scented Crab. North America, 1724. This is a
handsome species, with ovate, irregularly-toothed leaves, and pink and
white fragrant flowers. The flowers are individually large and
corymbose, and are succeeded by small green fruit.

P. DOMESTICA (_syn Sorbus domestica_).--True Service. Britain. This
resembles the Mountain Ash somewhat, but the flowers are panicled, and
the berries fewer, larger, and pear-shaped. The flowers are conspicuous
enough to render the tree of value in ornamental planting.

P. FLORIBUNDA (_syns P. Malus floribunda_ and _Malus microcarpa
floribunda_).--China and Japan, 1818. The Japanese Crabs are wonderfully
floriferous, the branches being in most instances wreathed with flowers
that are individually not very large, and rarely exceeding an inch in