also. Various stocks dwarf the plum. The chief dwarf stock at present is the Myrobolan. This is usually imported. It is easily grown, either from seeds or cuttings. The Mirabelle, a foreign stock, is sometimes used. The many species of native plums, of the _Prunus Americana_ and _P. angustifolia_ (Chickasaw) types, are good stocks for dwarf or intermediate trees. In most cases, the bud or graft grows luxuriantly for two or three years, and thereafter grows rather slowly. It is best to bud or graft low upon these stocks. The Marianna is at present the most popular native stock. The native or American plums are budded upon native seedlings, or rarely upon _Prunus domestica_ seedlings; or they are grown from cuttings, as in the case of Marianna. The Japanese plums are worked upon peach, common plum or upon natives, preferably Marianna. _Prunus Simoni_ works upon peach, common plum, Myrobolan and Marianna. The ornamental plums are worked upon the same stocks as the fruit-bearing sorts. See Prunus. =Plum, Coco.= See Chrysobalanus. =Plumbago= (Leadwort). _Plumbagineæ._ Seeds, divisions and cuttings. Cuttings are made from firm nearly mature wood, and should be given mild bottom heat. =Plumeria=, Himatanthus. _Apocynaceæ._ Seeds. Make cuttings of ripe shoots, and place under glass. =Podalyria.= _Leguminosæ_ Readily increased by seeds. Divisions do not succeed well. In spring, cuttings may be made of strong side shoots, and planted in sand under glass. =Podocarpus= _Coniferæ._ Usually grown from cuttings of firm wood under cover. =Podophyllum= (May-Apple, Mandrake; erroneously Duck's Foot) _Berberideæ._ Seeds and division. =Poinciana.= _Leguminosæ._ Propagation by seeds. =Poinsettia=, Euphorbia. _Euphorbiaceæ_ Cuttings of growing shoots, of two or three buds each, handled upon a cutting bench or in a frame. Many propagators prefer to let the cuttings lie exposed two or three days before setting them. Cuttings of ripened wood can be used to good advantage where the heat is rather low. See Euphorbia. =Polanisia.= _Capparideæ._ Seeds, in-doors or in the open. =Polemonium.= _Polemoniaceæ._ Propagated by seeds and by division. =Polianthes= (Tuberose). _Amaryllideæ._ Increased by bulbels. Remove these from the parent bulb in the fall, and keep in a warm, dry place until the following spring. The soil should be light, rich and moist throughout the summer. Before frost comes in the fall, take the bulbs up, and when dry, cut off the leaves. The bulbs should be kept as during the preceding winter, and the culture during the following year is the same as during the first. The bulbs usually flower the second or third summer. =Polyanthus.= See Primula. =Polycarpæa.= _Caryophylleæ._