MEDICAGO ARBOREA.--South Europe, 1596. This species grows to the height
of 6 feet or 8 feet, and produces its Pea-shaped flowers from June
onwards. The leaves are broadly oval and serrated at the tips, but they
vary in this respect. It is not hardy unless in warm, sheltered corners
of southern England and Ireland, although it stood unharmed for many
years at Kew. It succeeds best, and is less apt to receive injury, when
planted in rather dry and warm soil.