Increased during spring by cuttings, placed in sand under a glass and in a gentle heat. =Bougainvillea.= _Nyctagineæ._ Propagated by cuttings from the half-ripened wood. Place in sandy soil, in a brisk heat. Also grown from root-cuttings. =Bouncing Bet.= See Saponaria. =Bourbon Palm.= See Latania. =Boussingaultia.= _Chenopodiaceæ._ Increased by seeds, and easily by means of the tubercles of the stem. =Bouvardia.= _Rubiaceæ._ The old plants should be cut back, placed in heat in a stove or pit, and freely syringed, which will cause them to break freely and produce a good supply of cuttings. They will root from any surface of the stem, and should be about two inches long. The cuttings should be dibbled pretty thickly into pots about five inches across. A good watering must be given without wetting and thereby injuring the foliage. Plunge the pots in bottom heat of about 70° or 80°, and cover with a bell-glass. Keep moist and shady during sunshine, till rooted. They are also readily and more easily increased by root-cuttings. =Bowiea.= _Liliaceæ._ Propagated by seeds or offsets. =Bowstring Hemp.= See Sanseviera. =Box Elder.= See Negundo. =Box Thorn.= See Lycium. =Box Tree.= See Buxus. =Brachychiton.= _Sterculiaceæ._ Increased by young cuttings planted in sandy soil in gentle heat. =Brachycome= (Swan River Daisy). _Compositæ._ Propagated by seeds sown in early spring in a gentle hot-bed, or they may be sown thinly out-doors, late in spring. =Brachylæna.= _Compositæ._ Propagated by cuttings from the half-ripened shoots, placed in a well-drained pot of sandy soil, under a bell-glass. =Brachyrhynchos.= See Senecio. =Brachysema.= _Leguminosæ._ By seeds sown in spring in heat. By layers. In summer by cuttings from the half-ripened shoots, placed in sandy soil under a bell-glass, in a gentle bottom heat. =Brachystelma.= _Asclepiadeæ._ Propagated by divisions of the root, and by cuttings in a sandy soil, in heat. =Bradleia.= See Phyllanthus. =Brahea.= _Palmæ._ Propagated by seeds in heat. =Brassia.= _Orchideæ._ Increased by dividing the plant when growth has commenced. (See under Orchids.) =Bravoa.= _Amaryllideæ._ Propagated by seeds sown as soon as ripe, and by offsets in autumn. =Bread Fruit.= See Artocarpus. =Bread Nut.= See Brosimum. =Breakstone.= See Saxifraga. =Bredia.= _Melastomaceæ._ Increased by seeds, and by cuttings from the ripened shoots placed in sandy loam, under a hand-glass, in heat. =Brexia.= _Saxifrageæ._ Increased by cuttings, the leaves of which should not be shortened. Place in sand under a hand-glass, in heat; or a leaf taken off with a bud attached will grow. =Briza= (Quaking Grass). _Gramineæ._ Propagated by seeds, which may be sown in spring or in autumn.