In spring, cuttings may be made and inserted in sand, under glass. =Marsh-Mallow.= See Althæa. =Marsh-Marigold.= See Caltha. =Martynia= (Unicorn Plant). _Pedalineæ._ Seeds, sown where the plants are to grow, or started under glass in the north. =Masdevallia.= _Orchideæ._ Division. (See also under Orchids.) =Matthiola= (Stock, Gilliflower). _Cruciferæ._ Seeds, sown either under cover or in the garden. Grows readily from cuttings. =Maurandya=, including Lophospermum. _Scrophularineæ._ Seeds, sown in heat. Cuttings of young growth under glass. =Mauritia=, including Orophoma. _Palmæ._ Sow seeds in heat. =Maxillaria.= _Orchideæ._ Division of the plants, and also of the pseudo-bulbs. (See also under Orchids.) =May-Apple.= See Podophyllum. =Meadow-Rue.= See Thalictrum. =Meadow-Sweet.= See Spiræa. =Meconopsis.= _Papaveraceæ._ Seeds, sown in early spring in a gentle heat. Also propagated by division. =Medeola= (Indian Cucumber). _Liliaceæ._ Seeds. May be increased by dividing the plants in spring. =Medicago= (Lucerno, Medick). _Leguminosæ._ Propagated by seeds or divisions. =Medinilla.= _Melastomaceæ._ Cuttings of young wood in strong, close heat. =Medlar= (_Pyrus_ [or _Mespilus_] _Germanica_). _Rosaceæ._ Stocks are grown from stratified medlar seeds, and the plant may be worked upon these, the thorn or quince. =Megarrhiza.= _Cucurbitaceæ._ Propagation is effected by seeds, sown in gentle heat in spring. =Melittis= (Bastard Balm). _Labiatæ._ Seeds and division. =Melaleuca.= _Myrtaceæ._ Seeds. In spring, cuttings getting firm at the base may be made about three inches in length. Place in a compost of peat and sandy loam. =Melastoma.= _Melastomaceæ._ Make cuttings during spring, and place in sandy peat under glass in heat. =Melia= (Bead-tree). _Meliaceæ._ Seeds, sown as soon as ripe. Cuttings of growing wood under glass. =Melianthus= (Honey Flower). _Sapindaceæ._ Increased by seeds, by root-sprouts, or by cuttings, which root freely under glass. =Melichrus.= _Epacrideæ._ Cuttings of the shoots should be made, about two inches long, and inserted in sandy soil. =Melicocca= (Ginep, Spanish Lime). _Sapindaceæ._ Seeds. Place ripened cuttings in sand under glass, in heat. =Melocactus.= See Cactus. =Melon= (_Cucumis Melo_). _Cucurbitaceæ._ Seeds, sown where the plants are to stand. In the north they are occasionally started under glass in pots or pieces of inverted sods, by amateurs. =Menispermum= (Moon-seed). _Menispermaceæ._ Propagated by seeds, divisions or cuttings in spring. =Menyanthes= (Buckbean). _Gentianeæ._ Increased by seeds; by divisions of the roots. =Menziesia.= _Ericaceæ._ May be increased by dividing established tufts, by layers or by cuttings.