=Mertensia=, Lungwort. _Boragineæ._ Propagation is effected by sowing seeds as soon as ripe, or by divisions in autumn. =Mesembryanthemum= (Fig Marigold, Ice Plant). _Ficoideæ._ May be easily propagated by seeds, sown under glass; by pieces, pulled or cut off, and laid in the sun on moist sand. =Mespilus.= See Medlar. =Metrosideros.= _Myrtaceæ._ Propagated by seeds; also by cuttings of the hardened wood in late autumn. =Mezereum=, Mezereon. See Daphne. =Michælmas Daisy.= See Aster. =Michauxia.= _Campanulaceæ._ The seeds may be sown in the border in spring. =Michelia.= _Magnoliaceæ._ Seeds. Make cuttings of growing wood in summer, and place in sand under glass. =Mignonette.= See Reseda. =Milfoil.= See Achillea. =Milkweed.= See Asclepias. =Milla.= _Liliaceæ._ Increased by seeds, bulbels or divisions. =Miltonia.= _Orchideæ._ Dividing the pseudo-bulbs. (See also under Orchids.) =Mimosa= (Sensitive Plant). _Leguminosæ._ Seeds, sown in-doors. Cuttings of rather firm shoots, and inserted in sandy soil, in heat. =Mimulus= (Monkey Flower, Musk Plant). _Scrophularineæ._ Propagated by seeds, which should be thinly sown and lightly covered. Also by divisions and cuttings. =Mint.= See Peppermint and Spearmint. =Mirabilis=, Jalapa (Marvel of Peru, Four-o'clock). _Nyctagineæ._ Seeds, sown in spring either under cover or out-doors. =Mistletoe.= See Viscum. =Mock Orange.= See Philadelphus. =Momordica.= _Cucurbitaceæ._ Increased by seeds, which should be sown in heat early in spring. =Monarda= (Horse Mint). _Labiatæ._ Seeds. Propagated also by dividing the roots. =Monk's Hood.= See Aconitum. =Monsonia.= _Geraniaceæ._ Propagation is effected by seeds, sown in-doors in spring; by division, or by cuttings placed in sandy soil under a hand-light, in spring or autumn. =Monstera=, Serangium, Tornelia. _Aroideæ._ Easily increased by seeds and by cuttings of the stem. =Montbretia.= See Tritonia. =Montezuma.= _Malvaceæ._ Make cuttings of rather firm shoots, and insert in sand under glass. =Moon-seed.= See Menispermum. =Moon-flower.= See Ipomœa. =Moricandia.= _Cruciferæ._ Propagated by seed, sown in the open ground during spring. =Moringa=, Anoma. _Moringeæ._ Make cuttings of half-ripened shoots in spring, and insert in sand under glass. =Morning-glory.= See Ipomœa. =Morus.= See Mulberry. =Mountain Ash.= See Pyrus. =Mountain Laurel.= See Kalmia. =Mourning Bride.= See Scabiosa. =Mucuna.= _Leguminosæ._ Propagation may be effected by seeds or by cuttings of half-ripened wood, under glass. =Muehlenbeckia=, Sarcogonum. _Polygonaceæ._ Seeds. Increased usually by cuttings, taken in early summer in a frame. =Mulberry= (_Mortis alba_, _M. nigra_ and _M. rubra_). _Urticaceæ._