=Aloe.= _Liliaceæ._ Commonly propagated by suckers which spring from the base of the plant. Seeds are sometimes employed. =Alomia.= _Compositæ._ Propagated by cuttings. =Alona.= _Nolanaceæ._ Increased by cuttings, which root freely in sandy loam, with a very gentle bottom heat. =Alonsoa.= _Scrophularineæ._ Propagated by seeds, sown in spring; also by cuttings in sandy soil, in gentle heat. The herbaceous species may be treated as out-door summer annuals, and should be raised in little heat, and planted out in May. =Aloysia= (Sweet-scented Verbena, Lemon Verbena). _Verbenaceæ._ Increased easily in spring by young wood. They will root in about three weeks, in sandy soil with gentle heat. Also by cuttings of ripened wood in autumn. =Alpinia.= _Zingiberaceæ._ Increased by division after the young shoots have made an inch of growth in spring. =Alsodeia.= _Violarieæ._ Propagated by cuttings, which root readily under a bell-glass, if planted in sand, in heat. =Alsophila.= See Ferns. =Alstonia.= _Apocynaceæ._ Propagated by cuttings rooted in sand, in heat. =Alstrœmeria.= _Amaryllideæ._ Increased by seeds. By a careful division of the fleshy roots, during fall or spring. =Alternanthera.= _Amarantaceæ._ Commonly raised from cuttings of growing wood. For spring and summer bedding, the plants are started in late winter. The stock-plants, from which cuttings are taken, are procured from cuttings made late in summer. Seeds are little used. =Althæa= (Marsh-Mallow, Hollyhock). _Malvaceæ._ Increased by seeds, and by divisions. The biennial species must be raised from seeds every year. =Alum Root.= See Heuchera. =Alyssum=, including Psilonema, Ptilotrichum, Schivereckia (Madwort). _Cruciferæ._ Increased by seed sown in the open border or in pans of sandy soil. By divisions. By layers. By cuttings made from young shoots two to three inches in length, placed in sandy loam, early in the season, in a shady place. =Amaranthus.= _Amarantaceæ._ Propagated by seeds sown in hot-beds in spring, and thinned out when about one-half inch high. About the end of May, they can be transplanted out-doors in their permanent situation, or into pots. =Amaryllis.= _Amaryllideæ._ Propagated by seeds and offsets. Seedlings will bloom in from one to two years. =Amber Tree.= See Anthospermum. =Amblyanthera.= See Mandevilla. =Ambrosinia.= _Aroideæ._ Increased by seeds sown as soon as ripe, in a cool house: and by divisions made just previous to new growth in spring. =Amelanchier.= _Rosaceæ._ Seeds. Layers and cuttings in autumn. By grafting, in early spring, on the Mountain Ash, Hawthorn or the Quince, or the weaker on the stronger-growing species. See Juneberry. =Amellus.= _Compositæ._