The flowers of the plants contained in this tribe have generally five regular, widely spreading petals, which are never joined together; and stamens of unequal length, which with few exceptions are also perfectly free. The petals are generally of the same size and shape; though sometimes, as in the Barbadoes Flower-fence (_Poinciana_, or _Cæsalpinia pulcherrima_), four are of the same shape, and one deformed (see _fig. 18_). The filaments of some of the stamens are very long and curving over, but the others are much shorter and erect; the style is long and slender, ending in a pointed stigma. The legume is flat, and it looks almost many-celled, from the seeds being divided from each other by a kind of spongy substance, frequently found in the pods of plants belonging to this division. The leaves are bi-pinnate, and the stem is spiny. The Carob-tree, or St. John’s bread (_Ceratonia siliqua_), agrees with the Barbadoes Flower-fence in the pulpy matter dividing the seeds, though it differs widely in its flowers, which are without petals, and do not possess any beauty. The pulp of the pods of the Carob tree is eatable; but that of Poinciana is said to be injurious. The pod of the Tamarind (_Tamarindus indica_) differs from the preceding species in having the pulpy matter of its pods contained between the outer and inner skin of each valve, like the fleshy substance in the pod of the pea, instead of serving as a bed for the seeds. The flowers of the tamarind have five equal petals of a brownish yellow, three of them being streaked with pink; and the anthers are nearly rose-colour. The stamens and the style both curve upwards. It is the pods prepared with sugar that form what we call Tamarinds. In _Cassia lanceolata_, the leaves of which furnish senna, the flowers have a bright yellow corolla of five concave petals, three of which are somewhat larger than the others. The stamens are also unequal in length; and the style curves upwards. The legume is kidney-shaped, and the cells are divided from each other by thin membraneous partitions. The Gleditschia or Honey Locusts, now so frequently planted in our shrubberies on account of the lightness and elegance of their foliage, belong to this division, and some of them, particularly the Chinese Thorny Acacia (_Gleditschia horrida_), are remarkable for their thorns proceeding from the trunk and large branches, as well as from the axils of the leaves. The Logwood (_Hæmatoxylon Campechianum_), has inconspicuous yellow flowers, the petals being very little longer than the calyx; and the legume has seldom more than two seeds. Though it is considered a tree, the stem is seldom thicker than the arm of a man, and it is generally crooked; chips of the wood are used for dyeing purple. The Judas-tree (_Cercis siliquastrum_) is another species belonging to this division, as, though the flowers appear of the papilionaceous kind, they are, in fact, composed of five petals, nearly equal in size, but having the