purple flowers larger than those of the potato. Some other species have white flowers, and one much resembles our bitter-sweet (_Solanum Dulcamara_). Many handsome convolvuluses climb over the hedges, as well as several most beautiful _Bignonias_ or trumpet-flowers, with yellow, orange, or purple blossoms. But most striking of all are the passion-flowers, which are abundant on the skirts of the forest, and are of various colours,—purple, scarlet, or pale pink: the purple ones have an exquisite perfume, and they all produce an agreeable fruit—the grenadilla of the West Indies. There are besides many other elegant flowers, and numbers of less conspicuous ones. The papilionaceous flowers, or peas, are common; cassias are very numerous, some being mere weeds, others handsome trees, having a profusion of bright yellow blossoms. Then there are the curious sensitive plants (_Mimosa_), looked upon with such interest in our greenhouses, but which here abound as common wayside weeds. Most of them have purple or white globular heads of flowers. Some are very sensitive, a gentle touch causing many leaves to drop and fold up; others require a ruder hand to make them exhibit their peculiar properties; while others again will scarcely show any signs of feeling, though ever so roughly treated. They are all more or less armed with sharp prickles, which may partly answer the purpose of guarding their delicate frames from some of the numerous shocks they would otherwise receive. The immense number of orange-trees about the city is an interesting feature, and renders that delicious fruit always abundant and cheap. Many of the public roads are lined with them, and every garden is well stocked, so that the cost is merely the trouble of gathering and taking to market. The mango is also abundant, and in some of the public avenues is planted alternately with the Mangabeira, or silk cotton-tree, which grows to a great size, though, as its leaves are deciduous, it is not so well adapted to produce the shade so much required as some evergreen tree. On almost every road-side, thicket, or waste, the coffee-tree is seen growing, and generally with flower or fruit, and often both; yet such is the scarcity of labour or indolence of the people, that none is gathered but a little for private consumption, while the city is almost entirely supplied with coffee grown in other parts of Brazil.