The orchidaceous plants grown in a _damp stove_ are all epiphytes, which, in their natural state, grow either on the branches of trees, or on exposed rocks. The former of these are found in their wild state with their roots hanging down in the air, and growing in dense forests, where shade, moisture, and excessive heat are essential to their existence. Most of these plants, in a state of culture, are grown in the husks of cocoa-nuts, half filled with moss, from which the roots hang down, or they are tied with wire to pieces of wood hung from the rafters. The wood generally preferred for this purpose in England is the robinia, or false acacia, on account of the roughness of its bark, and the softness of its wood: and moss is generally put between the epiphyte and log so as to make it quite compact. Some genera of orchideous plants, such as Dendròbium, Epidéndrum, and Cattlèya, are always grown in pots, which are filled with turfy peat, chopped moss, and lime rubbish. Others, such as Stanhòpea and Catasètum, should be grown in baskets half filled with moss, or in a curious kind of frame, made of pieces of turf fastened between four upright pegs of wood; as the flowers of these plants come from their roots, and they must be allowed abundance of room to enable them to protrude properly. The baskets or frames for the Stanhòpea and other root-flowering plants should be from three to six inches deep, and from six to ten inches wide; and the frames should be filled with strips of turf, two or three inches wide, piled up on one another so as to fill the frame, and yet leave a sufficient space between to admit the passage of the flower stems which protrude downwards from the root. When orchideous plants are grown in pots, the pots are drained with cinders, and then filled with chopped turf mixed with lime rubbish to keep it open. The exotic ferns grown in the same house require no particular care, except that of potting them so as to insure perfect drainage, and keeping them frequently syringed overhead. There may be said to be five kinds of greenhouse; viz., the Australian house, the common greenhouse, the heath house, the conservatory, and the orangery, to which is sometimes added, the camellia house, though these plants are generally kept in the conservatory.