=Myrodia=, Lexarsa. _Sterculiaceæ._ Cuttings of firm shoots, which should be placed in sand under glass, in heat. =Myroxylon= (Tolu Balsam-tree). _Leguminosæ._ Propagation is effected during summer by cuttings of growing shoots placed in sand in a frame. =Myrrhis= (Sweet Cicely or Myrrh). _Umbelliferæ._ May be increased by divisions or by seeds. =Myrsiphyllum.= _Liliaceæ._ Freely increased by seeds, by divisions, or by cuttings. _M. asparagoides_, the "Smilax" or Boston-vine of greenhouses, is increased by seeds, which germinate readily. =Myrtus=, including Ugni (Myrtle). _Myrtaceæ._ Seeds, when they can be obtained. Readily propagated by cuttings of firm or partially ripened shoots, placed in a close frame; those of the stove species require a warmer temperature than the half-hardy ones. =Nægelia.= _Gesneraceæ._ Seeds rarely. Propagation is effected by potting the runners in spring or summer in a compost of peat, leaf soil and a little loam. Cuttings of young shoots, as mature leaves, will also root readily. =Napoleona=, Belvisia. _Myrtaceæ._ Increased by cuttings of half-ripened shoots two to four inches long, in mild bottom heat. =Narcissus= (Daffodil, Jonquil, Chinese Sacred Lily). _Amaryllideæ._ New varieties are grown from seeds, which give flowering bulbs in three or four years. Ordinarily increased by bulbels, which usually flower the second year. =Nasturtium.= See Water-Cress and Tropæolum. =Nauclea.= _Rubiaceæ._ May be increased by cuttings of growing shoots, in heat. =Nectarine.= See Peach. =Negundo= (Box Elder). _Sapindaceæ._ Propagates with readiness by seeds, which should be sown as soon as ripe. Also by cuttings of mature wood, handled like grape cuttings. =Neillia.= Handled the same as Spiræa, which see. =Nelumbo=, Nelumbium (Water Chinquapin, Lotus, Water Bean). _Nymphæaceæ._ Seeds, which may be sown in shallow pans of water in the garden, or if sown in ponds they may be incorporated in a ball of clay and dropped into the water. The seeds of some species are very hard, and germination is facilitated if they are very carefully filed or bored (see Fig. 7). Sections of the rhizomes may be used instead. They should always be covered with water, at least a foot or two deep, if out-doors. =Nemastylis=, Nemostylis. _Irideæ._ Propagation is effected by seeds, or by bulbels. =Nematanthus.= _Gesneraceæ._ Seeds rarely. Freely increased by cuttings, inserted in sandy soil and kept rather dry. =Nemopanthes= (Mountain Holly). _Ilicineæ._ Increased by seeds, which should be sown as soon as ripe or else stratified; also by division of old plants. =Nemophila.= _Hydrophyllaceæ._ Seeds may be sown in late summer or any time during early spring. =Nepenthes= (Pitcher Plant). _Nepenthaceæ._