CARAGANA ARBORESCENS.--Siberian Pea Tree. Siberia, 1752. On account
of its great hardihood, this is a very desirable garden shrub or
small-growing tree. The bright-yellow, pea-shaped flowers are very
attractive, while the deep-green, pinnate foliage imparts to the tree a
somewhat unusual but taking appearance. Soil would not seem to be of
much moment in the cultivation of this, as, indeed, the other species
for it thrives well either on dry, sunny banks, where the
soil is light and thin, or in good stiff, yellow loam.
C. FRUTESCENS.--Siberia, 1852. Flowers in May, and is of partially
upright habit; while C. Chamlagii, from China, has greenish-yellow
flowers, faintly tinted with pinky-purple.
C. MICROPHYLLA (_syn C. Altagana_), also from Siberia, is smaller of
growth than the foregoing, but the flowers are individually larger. It
is readily distinguished by the more numerous and hairy leaflets and
C. SPINOSA.--Siberia, 1775. This, as the name indicates, is of spiny
growth, and is a beautiful and distinct member of the family. They are
all hardy, and readily propagated from seed.